From d7ec3d7096eca796cc29bd3b062dfcefc27deae4 Mon Sep 17 00:00:00 2001
From: cool-mist <n.suryap@gmail.com>
Date: Wed, 21 Jan 2026 00:01:44 +0530
Subject: [PATCH] config-ify

---
 {assets => src/bin/assets}/button.wav    | Bin
 {assets => src/bin/assets}/caskaydia.ttf | Bin
 {assets => src/bin/assets}/click.wav     | Bin
 {assets => src/bin/assets}/loss.wav      | Bin
 {assets => src/bin/assets}/mode.wav      | Bin
 {assets => src/bin/assets}/pieces.png    | Bin
 {assets => src/bin/assets}/win.wav       | Bin
 src/bin/sol_chess/game.rs                |  94 +++
 src/{ => bin/sol_chess}/game/button.rs   |   0
 src/{ => bin/sol_chess}/game/color.rs    |   0
 src/bin/sol_chess/game/constants.rs      |  39 ++
 src/bin/sol_chess/game/draw.rs           | 337 +++++++++++
 src/bin/sol_chess/game/logic.rs          | 312 ++++++++++
 src/{ => bin/sol_chess}/game/shadow.rs   |   0
 src/{ => bin/sol_chess}/game/sound.rs    |   2 +-
 src/{ => bin/sol_chess}/game/texture.rs  |   0
 src/{ => bin/sol_chess}/main.rs          |  23 +-
 src/board.rs                             |  21 +-
 src/board/constants.rs                   |   2 +-
 src/game.rs                              | 720 -----------------------
 src/game/constants.rs                    |   1 -
 src/lib.rs                               |   2 +-
 22 files changed, 810 insertions(+), 743 deletions(-)
 rename {assets => src/bin/assets}/button.wav (100%)
 rename {assets => src/bin/assets}/caskaydia.ttf (100%)
 rename {assets => src/bin/assets}/click.wav (100%)
 rename {assets => src/bin/assets}/loss.wav (100%)
 rename {assets => src/bin/assets}/mode.wav (100%)
 rename {assets => src/bin/assets}/pieces.png (100%)
 rename {assets => src/bin/assets}/win.wav (100%)
 create mode 100644 src/bin/sol_chess/game.rs
 rename src/{ => bin/sol_chess}/game/button.rs (100%)
 rename src/{ => bin/sol_chess}/game/color.rs (100%)
 create mode 100644 src/bin/sol_chess/game/constants.rs
 create mode 100644 src/bin/sol_chess/game/draw.rs
 create mode 100644 src/bin/sol_chess/game/logic.rs
 rename src/{ => bin/sol_chess}/game/shadow.rs (100%)
 rename src/{ => bin/sol_chess}/game/sound.rs (93%)
 rename src/{ => bin/sol_chess}/game/texture.rs (100%)
 rename src/{ => bin/sol_chess}/main.rs (83%)
 delete mode 100644 src/game.rs
 delete mode 100644 src/game/constants.rs

diff --git a/assets/button.wav b/src/bin/assets/button.wav
similarity index 100%
rename from assets/button.wav
rename to src/bin/assets/button.wav
diff --git a/assets/caskaydia.ttf b/src/bin/assets/caskaydia.ttf
similarity index 100%
rename from assets/caskaydia.ttf
rename to src/bin/assets/caskaydia.ttf
diff --git a/assets/click.wav b/src/bin/assets/click.wav
similarity index 100%
rename from assets/click.wav
rename to src/bin/assets/click.wav
diff --git a/assets/loss.wav b/src/bin/assets/loss.wav
similarity index 100%
rename from assets/loss.wav
rename to src/bin/assets/loss.wav
diff --git a/assets/mode.wav b/src/bin/assets/mode.wav
similarity index 100%
rename from assets/mode.wav
rename to src/bin/assets/mode.wav
diff --git a/assets/pieces.png b/src/bin/assets/pieces.png
similarity index 100%
rename from assets/pieces.png
rename to src/bin/assets/pieces.png
diff --git a/assets/win.wav b/src/bin/assets/win.wav
similarity index 100%
rename from assets/win.wav
rename to src/bin/assets/win.wav
diff --git a/src/bin/sol_chess/game.rs b/src/bin/sol_chess/game.rs
new file mode 100644
index 0000000..d56338a
--- /dev/null
+++ b/src/bin/sol_chess/game.rs
@@ -0,0 +1,94 @@
+use std::{
+    collections::HashMap,
+    fmt::{self, Display, Formatter},
+    sync::Arc,
+};
+
+mod button;
+mod color;
+pub mod constants;
+mod draw;
+mod logic;
+mod shadow;
+pub mod sound;
+mod texture;
+
+use button::Button;
+use macroquad::prelude::*;
+use sol_chess::board::{Board, BoardState};
+use sound::Sounds;
+
+pub struct Game {
+    // The generated puzzle. We keep a copy of this to reset the game.
+    original_board: Board,
+
+    // What is shown to the user
+    board: Board,
+
+    // Constants througout the game
+    texture_res: Texture2D,
+    sounds: Sounds,
+    font: Arc<Font>,
+    num_squares: usize,
+    heading_text: String,
+
+    // Update below on handle input
+    state: GameState,
+    debug: bool,
+    game_mode: GameMode,
+
+    // Update below on window resize
+    // Used for drawing the state
+    square_width: f32,
+    window_height: f32,
+    window_width: f32,
+    board_rect: Rect,
+    squares: Vec<GameSquare>,
+    heading_rect: Rect,
+    heading_font_size: f32,
+    gp_btns: HashMap<ButtonAction, Button>,
+    mode_btns: HashMap<GameMode, Button>,
+    rules: bool,
+    rules_btn: Option<Button>,
+}
+
+struct GameSquare {
+    rect: Rect,
+    color: Color,
+    is_source: bool,
+    is_target: bool,
+    is_previous_target: bool,
+    i: usize,
+    j: usize,
+}
+
+#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
+pub enum ButtonAction {
+    Reset,
+    Next,
+}
+
+#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
+pub enum GameMode {
+    Easy,
+    Medium,
+    Hard,
+}
+
+#[derive(Copy, Clone)]
+enum GameState {
+    SelectSource(Option<(usize, usize)>),
+    SelectTarget((usize, usize)),
+    GameOver((usize, usize)),
+}
+
+impl Display for GameState {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        match self {
+            GameState::SelectSource(Some(x)) => write!(f, "Select Source [ {}, {} ]", x.0, x.1),
+            GameState::SelectSource(None) => write!(f, "Select Source [ ]"),
+            GameState::SelectTarget(x) => write!(f, "Select Target [ {}, {} ]", x.0, x.1),
+            GameState::GameOver(x) => write!(f, "Game Over [ {}, {} ]", x.0, x.1),
+        }
+    }
+}
diff --git a/src/game/button.rs b/src/bin/sol_chess/game/button.rs
similarity index 100%
rename from src/game/button.rs
rename to src/bin/sol_chess/game/button.rs
diff --git a/src/game/color.rs b/src/bin/sol_chess/game/color.rs
similarity index 100%
rename from src/game/color.rs
rename to src/bin/sol_chess/game/color.rs
diff --git a/src/bin/sol_chess/game/constants.rs b/src/bin/sol_chess/game/constants.rs
new file mode 100644
index 0000000..630d580
--- /dev/null
+++ b/src/bin/sol_chess/game/constants.rs
@@ -0,0 +1,39 @@
+#[cfg(not(debug_assertions))]
+pub const WINDOW_TITLE: &str = "Solitaire Chess";
+
+#[cfg(debug_assertions)]
+pub const WINDOW_TITLE: &str = "MOVE TO WORKSPACE 10";
+
+pub const HEADING_TEXT: &str = "Solitaire Chess";
+pub const VOLUME: f32 = 0.1; // Between 0 and 1
+pub const SCREEN_HEIGHT_MIN: f32 = 200.0;
+pub const SCREEN_HEIGHT_MAX: f32 = 10000.0;
+pub const SCREEN_WIDTH_MIN: f32 = 200.0;
+pub const SCREEN_WIDTH_MAX: f32 = 10000.0;
+
+// How big the square should be relative to the screen size, between 0 and 1
+pub const BOARD_SQUARE_WIDTH_MULTIPLIER: f32 = 0.15;
+
+pub const BOARD_SHADOW_MULTIPLIER: f32 = 0.1;
+
+pub const BOARD_PIECE_WIDTH_MULTIPLIER: f32 = 0.8;
+
+// How big the heading text font size should be relative to the screen size, between 0 and 1
+pub const HEADING_FONT_SIZE_MULTIPLIER: f32 = 0.07;
+
+// Height of the button relative to the screen size.
+pub const BUTTON_HEIGHT_MULTIPLIER: f32 = 0.08;
+
+// Width of the button relative to the 'board size'
+pub const BUTTON_WIDTH_MULTIPLIER: f32 = 0.20;
+
+// Gap between the bottom of the row and the first row of buttons
+pub const BOTTOM_BUTTON_ROW_OFFSET_MULTIPLIER: f32 = 0.3;
+
+pub const RESET_BUTTON_TEXT: &str = "RESET";
+pub const NEXT_BUTTON_TEXT: &str = "NEXT";
+pub const RULES_BUTTON_TEXT: &str = "RULES";
+pub const RULES_BUTTON_ALT_TEXT: &str = "CLOSE";
+pub const EASY_BUTTON_TEXT: &str = "EASY";
+pub const MEDIUM_BUTTON_TEXT: &str = "MEDIUM";
+pub const HARD_BUTTON_TEXT: &str = "HARD";
diff --git a/src/bin/sol_chess/game/draw.rs b/src/bin/sol_chess/game/draw.rs
new file mode 100644
index 0000000..0427d1f
--- /dev/null
+++ b/src/bin/sol_chess/game/draw.rs
@@ -0,0 +1,337 @@
+use macroquad::{math, prelude::*};
+use std::collections::HashMap;
+
+use super::{
+    button::Button, color::UiColor, constants, shadow, texture::PieceTexture, ButtonAction, Game,
+    GameMode,
+};
+
+impl Game {
+    pub fn draw(&mut self) {
+        self.update_window_size();
+        self.draw_heading();
+        self.draw_board();
+        self.draw_buttons();
+        self.draw_debug();
+    }
+
+    fn update_window_size(&mut self) {
+        let new_height = math::clamp(
+            screen_height(),
+            constants::SCREEN_HEIGHT_MIN,
+            constants::SCREEN_HEIGHT_MAX,
+        );
+        let new_width = math::clamp(
+            screen_width(),
+            constants::SCREEN_WIDTH_MIN,
+            constants::SCREEN_WIDTH_MAX,
+        );
+
+        if new_height == self.window_height && new_width == self.window_width {
+            return;
+        }
+
+        self.window_height = new_height;
+        self.window_width = new_width;
+        self.initialize_drawables();
+    }
+
+    fn initialize_drawables(&mut self) {
+        let min_dimension = f32::min(self.window_height, self.window_width);
+        self.square_width = constants::BOARD_SQUARE_WIDTH_MULTIPLIER * min_dimension;
+        let board_width = self.square_width * self.num_squares as f32;
+        let board_x = (self.window_width - board_width) / 2.0;
+        let board_y = (self.window_height - board_width) / 2.0;
+        self.board_rect = Rect::new(board_x, board_y, board_width, board_width);
+
+        self.heading_font_size = constants::HEADING_FONT_SIZE_MULTIPLIER * min_dimension;
+        let f = self.heading_font_size.floor() as u16;
+        let dims = measure_text(self.heading_text.as_str(), Some(&self.font), f, 1.0);
+        self.heading_rect = Rect::new(
+            board_x + (board_width - dims.width) / 2.0,
+            (board_y - dims.height) / 2.0,
+            dims.width,
+            dims.height,
+        );
+
+        let dark = UiColor::Brown.to_bg_color();
+        let light = UiColor::Yellow.to_bg_color();
+        let mut rects = Vec::new();
+        for i in 0..self.num_squares {
+            for j in 0..self.num_squares {
+                let x_eff = board_x + (i as f32 * self.square_width);
+                let y_eff = board_y + (j as f32 * self.square_width);
+                let rect = Rect::new(x_eff, y_eff, self.square_width, self.square_width);
+                let color = match (i + j) % 2 {
+                    1 => dark,
+                    _ => light,
+                };
+
+                rects.push(super::GameSquare {
+                    rect,
+                    color,
+                    i,
+                    j,
+                    is_source: false,
+                    is_target: false,
+                    is_previous_target: false,
+                });
+            }
+        }
+
+        self.squares = rects;
+
+        let btn_h = constants::BUTTON_HEIGHT_MULTIPLIER * min_dimension;
+        let btn_w = board_width * constants::BUTTON_WIDTH_MULTIPLIER;
+        let btn_y = board_width
+            + board_y
+            + constants::BOTTOM_BUTTON_ROW_OFFSET_MULTIPLIER * self.square_width;
+        let btn_reset_x_offset =
+            (self.board_rect.w - self.square_width) + (self.square_width - btn_w) / 2.;
+        let reset_btn = Button::new(
+            constants::RESET_BUTTON_TEXT,
+            Rect::new(board_x + btn_reset_x_offset, btn_y, btn_w, btn_h),
+            UiColor::Yellow,
+            self.sounds.button.clone(),
+            self.font.clone(),
+        );
+
+        let btn_next_x_offset =
+            (self.board_rect.w - 2. * self.square_width) + (self.square_width - btn_w) / 2.;
+        let mut next_btn = Button::new(
+            constants::NEXT_BUTTON_TEXT,
+            Rect::new(board_x + btn_next_x_offset, btn_y, btn_w, btn_h),
+            UiColor::Green,
+            self.sounds.button.clone(),
+            self.font.clone(),
+        );
+        next_btn.is_active = false;
+
+        self.gp_btns = HashMap::new();
+        self.gp_btns.insert(ButtonAction::Next, next_btn);
+        self.gp_btns.insert(ButtonAction::Reset, reset_btn);
+
+        let rules_button = Button::new(
+            constants::RULES_BUTTON_TEXT,
+            Rect::new(
+                (board_x - btn_w) / 2.,
+                board_y + (self.square_width - btn_h) / 2.,
+                btn_w,
+                btn_h,
+            ),
+            UiColor::Brown,
+            self.sounds.button.clone(),
+            self.font.clone(),
+        );
+        self.rules_btn = Some(rules_button);
+
+        let easy_btn = Button::new(
+            constants::EASY_BUTTON_TEXT,
+            Rect::new(
+                (board_x - btn_w) / 2.,
+                board_y + self.square_width + (self.square_width - btn_h) / 2.,
+                btn_w,
+                btn_h,
+            ),
+            UiColor::Yellow,
+            self.sounds.mode.clone(),
+            self.font.clone(),
+        );
+
+        let medium_btn = Button::new(
+            constants::MEDIUM_BUTTON_TEXT,
+            Rect::new(
+                (board_x - btn_w) / 2.,
+                board_y + 2. * self.square_width + (self.square_width - btn_h) / 2.,
+                btn_w,
+                btn_h,
+            ),
+            UiColor::Yellow,
+            self.sounds.mode.clone(),
+            self.font.clone(),
+        );
+
+        let hard_button = Button::new(
+            constants::HARD_BUTTON_TEXT,
+            Rect::new(
+                (board_x - btn_w) / 2.,
+                board_y + 3. * self.square_width + (self.square_width - btn_h) / 2.,
+                btn_w,
+                btn_h,
+            ),
+            UiColor::Yellow,
+            self.sounds.mode.clone(),
+            self.font.clone(),
+        );
+
+        self.mode_btns = HashMap::new();
+        self.mode_btns.insert(GameMode::Easy, easy_btn);
+        self.mode_btns.insert(GameMode::Medium, medium_btn);
+        self.mode_btns.insert(GameMode::Hard, hard_button);
+
+        for btn in &mut self.mode_btns {
+            btn.1.is_active = true;
+            if self.game_mode == *btn.0 {
+                btn.1.is_active = false;
+            }
+        }
+    }
+
+    fn draw_heading(&self) {
+        let f = self.heading_font_size.floor() as u16;
+        let dims = measure_text(self.heading_text.as_str(), Some(&self.font), f, 1.0);
+        let draw_text_params = TextParams {
+            font_size: f,
+            font: Some(&self.font),
+            color: BLACK,
+            ..Default::default()
+        };
+        draw_text_ex(
+            self.heading_text.as_str(),
+            self.heading_rect.x,
+            self.heading_rect.y + dims.offset_y,
+            draw_text_params,
+        );
+    }
+
+    fn draw_board(&self) {
+        let board_shadow_width = constants::BOARD_SHADOW_MULTIPLIER * self.square_width;
+        shadow::draw_shadow(self.board_rect, board_shadow_width);
+
+        if self.rules {
+            draw_rectangle(
+                self.board_rect.x,
+                self.board_rect.y,
+                self.board_rect.w,
+                self.board_rect.h,
+                UiColor::Yellow.to_bg_color(),
+            );
+
+            let font_size = self.heading_font_size * 0.6;
+            let rules = "\
+                Every move should be a \n\
+                capture. Win when only \n\
+                one piece is left.\n";
+            let measurement = measure_text(rules, Some(&self.font), font_size as u16, 1.0);
+            let draw_text_params = TextParams {
+                font_size: font_size as u16,
+                font: Some(&self.font),
+                color: UiColor::Brown.to_bg_color(),
+                ..Default::default()
+            };
+            draw_multiline_text_ex(
+                rules,
+                self.board_rect.x + 0.05 * self.square_width,
+                self.board_rect.y + 0.5 * (self.board_rect.h - measurement.height)
+                    - 2. * measurement.offset_y,
+                Some(2.),
+                draw_text_params,
+            );
+            return;
+        }
+
+        let sprite_size = constants::BOARD_PIECE_WIDTH_MULTIPLIER * self.square_width;
+        let mut selected_square = None;
+        self.squares.iter().for_each(|square| {
+            let color = match square.is_source {
+                true => square.color,
+                false => match square.is_target {
+                    true => UiColor::Pink.to_shadow_color(),
+                    false => square.color,
+                },
+            };
+
+            draw_rectangle(
+                square.rect.x,
+                square.rect.y,
+                square.rect.w,
+                square.rect.h,
+                color,
+            );
+
+            if let Some(p) = &self.board.cells[square.i][square.j] {
+                let offset = (square.rect.w - sprite_size) / 2.0;
+                let dtp = PieceTexture::for_piece(*p, sprite_size);
+                if !square.is_source {
+                    draw_texture_ex(
+                        &self.texture_res,
+                        square.rect.x + offset,
+                        square.rect.y + offset,
+                        WHITE,
+                        dtp,
+                    );
+                } else {
+                    selected_square = Some(square);
+                }
+            }
+        });
+
+        if let Some(selected_square) = selected_square {
+            if let Some(p) = self.board.cells[selected_square.i][selected_square.j] {
+                let dtp = PieceTexture::for_piece(p, sprite_size);
+                draw_texture_ex(
+                    &self.texture_res,
+                    mouse_position().0 - sprite_size / 2.0,
+                    mouse_position().1 - sprite_size / 2.0,
+                    WHITE,
+                    dtp,
+                );
+            }
+        }
+    }
+
+    fn draw_buttons(&mut self) {
+        for btn in &self.gp_btns {
+            btn.1.draw();
+        }
+
+        for btn in &self.mode_btns {
+            btn.1.draw();
+        }
+
+        if let Some(btn) = &self.rules_btn {
+            btn.draw();
+        }
+    }
+
+    fn draw_debug(&self) {
+        if self.debug {
+            let mut debug_lines = vec![];
+            let (mx, my) = mouse_position();
+            let hover_square = self.squares.iter().find(|s| {
+                let c = Circle::new(mx, my, 0.0);
+                if c.overlaps_rect(&s.rect) {
+                    return true;
+                }
+                return false;
+            });
+            debug_lines.push(format!("Game State: {}", self.state));
+            debug_lines.push(format!("Board State: {}", self.board.game_state));
+            if let Some(hover_square) = hover_square {
+                debug_lines.push(format!("Hover: [ {}, {} ]", hover_square.i, hover_square.j));
+            }
+            self.add_debug_info(debug_lines);
+
+            self.show_fps();
+        }
+    }
+
+    fn add_debug_info(&self, lines: Vec<String>) {
+        let mut y = 20.0;
+        for line in lines {
+            draw_text(&line, 10.0, y, 20.0, BLACK);
+            y += 25.0;
+        }
+    }
+
+    fn show_fps(&self) {
+        let fps = get_fps();
+        draw_text(
+            &format!("FPS: {}", fps),
+            10.0,
+            screen_height() - 20.0,
+            20.0,
+            BLACK,
+        );
+    }
+}
diff --git a/src/bin/sol_chess/game/logic.rs b/src/bin/sol_chess/game/logic.rs
new file mode 100644
index 0000000..7ea0b0b
--- /dev/null
+++ b/src/bin/sol_chess/game/logic.rs
@@ -0,0 +1,312 @@
+use std::{collections::HashMap, sync::Arc};
+
+use super::{
+    constants, sound::Sounds, Board, BoardState, ButtonAction, Game, GameMode, GameSquare,
+    GameState,
+};
+
+use macroquad::prelude::*;
+use sol_chess::{board, generator::{self, RandomRange}};
+
+impl Game {
+    fn get(&mut self, i: usize, j: usize) -> &mut GameSquare {
+        &mut self.squares[i * self.num_squares + j]
+    }
+
+    pub fn handle_input(&mut self) {
+        let mut gp_btn_clicked = None;
+        for btn in &mut self.gp_btns {
+            btn.1.handle_input();
+            if btn.1.is_clicked() {
+                gp_btn_clicked = Some(btn.0.clone());
+                break;
+            }
+        }
+
+        if let Some(action) = gp_btn_clicked {
+            match action {
+                ButtonAction::Reset => self.reset(),
+                ButtonAction::Next => self.next_puzzle(),
+            }
+        } else {
+            let mut mode_btn_clicked = None;
+            for btn in &mut self.mode_btns {
+                btn.1.handle_input();
+                if btn.1.is_clicked() {
+                    mode_btn_clicked = Some(btn);
+                    break;
+                }
+            }
+
+            if let Some(btn) = mode_btn_clicked {
+                self.game_mode = *btn.0;
+                self.next_puzzle();
+            } else {
+                let mut rules_btn_clicked = false;
+                if let Some(btn) = &mut self.rules_btn {
+                    btn.handle_input();
+                    if btn.is_clicked() {
+                        rules_btn_clicked = true;
+                    }
+                }
+
+                if rules_btn_clicked {
+                    self.rules = !self.rules;
+                }
+            }
+        }
+
+        for btn in &mut self.mode_btns {
+            if self.game_mode == *btn.0 {
+                btn.1.is_active = false;
+            } else {
+                btn.1.is_active = true;
+            }
+        }
+
+        if is_key_released(KeyCode::Escape) {
+            if self.rules {
+                Sounds::play(&self.sounds.button);
+            }
+
+            self.rules = false;
+        }
+
+        if let Some(rules_btn) = &mut self.rules_btn {
+            if self.rules {
+                rules_btn.text = constants::RULES_BUTTON_ALT_TEXT.to_string();
+            } else {
+                rules_btn.text = constants::RULES_BUTTON_TEXT.to_string();
+            }
+        }
+
+        if is_key_released(KeyCode::D) {
+            self.debug = !self.debug;
+            return;
+        }
+
+        if is_key_released(KeyCode::Q) {
+            std::process::exit(0);
+        }
+
+        if is_mouse_button_released(MouseButton::Left) {
+            let current_state = self.state.clone();
+            let new_state = match current_state {
+                GameState::SelectSource(previous_target) => {
+                    self.handle_select_source(mouse_position(), previous_target)
+                }
+                GameState::SelectTarget(source) => {
+                    let next = self.handle_select_target(mouse_position(), source);
+                    if let GameState::SelectTarget(_) = next {
+                        self.reset_squares();
+                        GameState::SelectSource(None)
+                    } else {
+                        next
+                    }
+                }
+
+                GameState::GameOver(previous_target) => GameState::GameOver(previous_target),
+            };
+            self.state = new_state;
+            return;
+        }
+
+        if is_mouse_button_pressed(MouseButton::Left) {
+            let current_state = self.state.clone();
+            let new_state = match current_state {
+                GameState::SelectSource(previous_target) => {
+                    self.handle_select_source(mouse_position(), previous_target)
+                }
+                GameState::SelectTarget(source) => GameState::SelectTarget(source),
+                GameState::GameOver(previous_target) => GameState::GameOver(previous_target),
+            };
+
+            self.state = new_state;
+        }
+    }
+
+    fn handle_select_source(
+        &mut self,
+        mouse_position: (f32, f32),
+        previous_target: Option<(usize, usize)>,
+    ) -> GameState {
+        self.reset_squares();
+        let (x, y) = mouse_position;
+        let mouse = Circle::new(x, y, 0.0);
+        let mut selected = None;
+        for square in &mut self.squares {
+            if mouse.overlaps_rect(&square.rect) {
+                if let Some(_) = self.board.cells[square.i][square.j] {
+                    selected = Some((square.i, square.j));
+                }
+            }
+        }
+
+        if let Some((i, j)) = selected {
+            self.get(i, j).is_source = true;
+            let mut target_squares = vec![];
+            for m in self.board.legal_moves.iter() {
+                if m.from.file == i && m.from.rank == j {
+                    target_squares.push((m.to.file, m.to.rank));
+                }
+            }
+
+            for (i, j) in target_squares {
+                self.get(i, j).is_target = true;
+            }
+
+            return GameState::SelectTarget(selected.unwrap());
+        }
+
+        if let Some((i, j)) = previous_target {
+            self.get(i, j).is_previous_target = true;
+        }
+
+        return GameState::SelectSource(None);
+    }
+
+    fn handle_select_target(
+        &mut self,
+        mouse_position: (f32, f32),
+        source: (usize, usize),
+    ) -> GameState {
+        let (x, y) = mouse_position;
+        let mouse = Circle::new(x, y, 0.0);
+
+        let mut selected = None;
+        for square in &mut self.squares {
+            if mouse.overlaps_rect(&square.rect) {
+                if let Some(_) = self.board.cells[square.i][square.j] {
+                    selected = Some((square.i, square.j));
+                }
+            }
+        }
+
+        let (s_x, s_y) = source;
+        let Some((x, y)) = selected else {
+            self.get(s_x, s_y).is_source = true;
+            return GameState::SelectTarget(source);
+        };
+
+        if x == s_x && y == s_y {
+            self.get(s_x, s_y).is_source = true;
+            return GameState::SelectTarget(source);
+        }
+
+        let mut is_legal = false;
+        if self.get(x, y).is_target {
+            is_legal = true;
+        }
+
+        if is_legal {
+            let m = self.board.legal_moves.iter().find(|m| {
+                m.from.file == s_x && m.from.rank == s_y && m.to.file == x && m.to.rank == y
+            });
+
+            let m = m.expect("legal move should be found");
+            self.board.make_move(m.clone());
+
+            if self.board.game_state == BoardState::Won || self.board.game_state == BoardState::Lost
+            {
+                self.reset_squares();
+                if self.board.game_state == BoardState::Won {
+                    let next_btn = self
+                        .gp_btns
+                        .get_mut(&ButtonAction::Next)
+                        .expect("Cannot find next button");
+                    next_btn.is_active = true;
+                    Sounds::play(&self.sounds.win);
+                } else {
+                    Sounds::play(&self.sounds.loss);
+                }
+
+                return GameState::GameOver((x, y));
+            }
+
+            self.reset_squares();
+            self.get(x, y).is_target = true;
+            Sounds::play(&self.sounds.click);
+            return GameState::SelectSource(Some((x, y)));
+        }
+
+        self.reset_squares();
+        return GameState::SelectSource(None);
+    }
+
+    fn reset(&mut self) {
+        self.board = self.original_board.clone();
+        self.reset_squares();
+
+        let next_button = self
+            .gp_btns
+            .get_mut(&ButtonAction::Next)
+            .expect("Cannot find next button");
+        next_button.is_active = false;
+
+        self.state = GameState::SelectSource(None);
+    }
+
+    fn next_puzzle(&mut self) {
+        self.reset();
+        let board = Game::generate_puzzle(self.game_mode);
+        self.original_board = board.clone();
+        self.board = board;
+    }
+
+    fn reset_squares(&mut self) {
+        for i in 0..self.num_squares {
+            for j in 0..self.num_squares {
+                self.get(i, j).is_source = false;
+                self.get(i, j).is_target = false;
+            }
+        }
+    }
+
+    fn generate_puzzle(mode: GameMode) -> Board {
+        let piece_count = match mode {
+            GameMode::Easy => 3,
+            GameMode::Medium => 5,
+            GameMode::Hard => 7,
+        };
+
+        let generate = generator::generate(piece_count, 100, &MacroquadRandAdapter);
+        generate.board().expect("No puzzle was generated")
+    }
+
+    pub fn new_game(texture_res: Texture2D, sounds: Sounds, font: Font) -> Self {
+        let num_squares: usize = board::constants::BOARD_SIZE;
+        let game_mode = GameMode::Medium;
+        let board = Game::generate_puzzle(game_mode);
+
+        Self {
+            original_board: board.clone(),
+            board,
+            board_rect: Rect::new(0., 0., 0., 0.),
+            squares: Vec::new(),
+            heading_rect: Rect::new(0., 0., 0., 0.),
+            heading_text: constants::HEADING_TEXT.to_string(),
+            heading_font_size: 0.,
+            num_squares,
+            texture_res,
+            sounds,
+            state: GameState::SelectSource(None),
+            game_mode,
+            debug: false,
+            gp_btns: HashMap::new(),
+            mode_btns: HashMap::new(),
+            rules: false,
+            rules_btn: None,
+            window_height: 0.,
+            window_width: 0.,
+            square_width: 0.,
+            font: Arc::new(font),
+        }
+    }
+}
+
+pub struct MacroquadRandAdapter;
+impl RandomRange for MacroquadRandAdapter {
+    fn gen_range(&self, min: usize, max: usize) -> usize {
+        rand::gen_range(min, max)
+    }
+}
diff --git a/src/game/shadow.rs b/src/bin/sol_chess/game/shadow.rs
similarity index 100%
rename from src/game/shadow.rs
rename to src/bin/sol_chess/game/shadow.rs
diff --git a/src/game/sound.rs b/src/bin/sol_chess/game/sound.rs
similarity index 93%
rename from src/game/sound.rs
rename to src/bin/sol_chess/game/sound.rs
index 0e41af8..01d3abf 100644
--- a/src/game/sound.rs
+++ b/src/bin/sol_chess/game/sound.rs
@@ -1,7 +1,7 @@
 use macroquad::audio::{self, Sound};
 use quad_snd::PlaySoundParams;
 
-use super::constants::VOLUME;
+use crate::constants::VOLUME;
 
 pub struct Sounds {
     pub click: Sound,
diff --git a/src/game/texture.rs b/src/bin/sol_chess/game/texture.rs
similarity index 100%
rename from src/game/texture.rs
rename to src/bin/sol_chess/game/texture.rs
diff --git a/src/main.rs b/src/bin/sol_chess/main.rs
similarity index 83%
rename from src/main.rs
rename to src/bin/sol_chess/main.rs
index 571ac2e..ad13715 100644
--- a/src/main.rs
+++ b/src/bin/sol_chess/main.rs
@@ -1,29 +1,26 @@
+mod game;
+
 use game::{sound::Sounds, Game};
 use macroquad::{audio, prelude::*};
 use miniquad::date;
+use sol_chess::board;
 
-mod game;
+use game::constants;
 
 fn window_conf() -> Conf {
     Conf {
-        window_title: get_window_title(),
+        window_title: constants::WINDOW_TITLE.to_string(),
         fullscreen: false,
         ..Default::default()
     }
 }
 
-#[cfg(debug_assertions)]
-fn get_window_title() -> String {
-    String::from("MOVE TO WORKSPACE 10")
-}
-
-#[cfg(not(debug_assertions))]
-fn get_window_title() -> String {
-    String::from("Solitaire Chess")
-}
-
 #[macroquad::main(window_conf)]
 async fn main() {
+    if board::constants::BOARD_SIZE != 4 {
+        panic!("NUM_SQUARES != 4 is not yet supported");
+    }
+
     rand::srand(date::now() as u64);
     let background_color = Color::from_rgba(196, 195, 208, 255);
     let mut game = init().await;
@@ -67,5 +64,5 @@ async fn init() -> Game {
         panic!("Failed to load font");
     };
 
-    Game::new(texture_res, sounds, font)
+    Game::new_game(texture_res, sounds, font)
 }
diff --git a/src/board.rs b/src/board.rs
index 6505b22..bfbaa0f 100644
--- a/src/board.rs
+++ b/src/board.rs
@@ -1,5 +1,5 @@
 pub mod cmove;
-mod constants;
+pub mod constants;
 pub mod errors;
 pub mod piece;
 pub mod square;
@@ -24,6 +24,7 @@ pub struct Board {
     pub cells: [[Option<Piece>; BOARD_SIZE]; BOARD_SIZE],
     pub legal_moves: HashSet<CMove>,
     pub game_state: BoardState,
+    pub id: String,
     pieces_remaining: u8,
 }
 
@@ -37,9 +38,12 @@ pub enum BoardState {
 
 impl Board {
     pub fn new() -> Self {
+        let cells = [[None; BOARD_SIZE]; BOARD_SIZE];
+        let id = Board::encode(cells);
         Board {
-            cells: [[None; BOARD_SIZE]; BOARD_SIZE],
+            cells,
             legal_moves: HashSet::new(),
+            id,
             pieces_remaining: 0,
             game_state: BoardState::NotStarted,
         }
@@ -147,16 +151,16 @@ impl Board {
     pub fn pretty_print(&self) {
         println!("{}", self.print(true));
         // println!("{:^40}\n", format!("id: {:#018x}", self.id()));
-        println!("{:^40}\n", format!("id: {}", self.id()));
+        println!("{:^40}\n", format!("id: {}", self.id));
     }
 
-    pub fn id(&self) -> String {
+    fn encode(cells: [[Option<Piece>; BOARD_SIZE]; BOARD_SIZE]) -> String {
         let mut res: u64 = 0;
 
         for i in 0..BOARD_SIZE {
             for j in 0..BOARD_SIZE {
                 res = res << 3;
-                let byte = Board::get_piece_encoding(self.cells[i][j]);
+                let byte = Board::get_piece_encoding(cells[i][j]);
                 res = res | byte as u64
             }
         }
@@ -320,6 +324,7 @@ impl Board {
     fn board_state_changed(&mut self) {
         self.calc_legal_moves();
         self.calc_game_state();
+        self.calc_id();
     }
 
     fn get_piece_encoding(piece: Option<Piece>) -> u8 {
@@ -348,6 +353,10 @@ impl Board {
             _ => Err(SError::InvalidBoard),
         }
     }
+
+    fn calc_id(&mut self) {
+        self.id = Board::encode(self.cells);
+    }
 }
 
 fn get_square_for_display(piece: &Option<Piece>, pretty: bool) -> String {
@@ -597,7 +606,7 @@ mod tests {
         board.set(sq!("Bd4"));
         board.set(sq!("Nc4"));
 
-        let id = board.id();
+        let id = board.id;
         let board2 = Board::from_id(&id);
         let board2 = board2.unwrap();
 
diff --git a/src/board/constants.rs b/src/board/constants.rs
index 84847df..c884dd1 100644
--- a/src/board/constants.rs
+++ b/src/board/constants.rs
@@ -1 +1 @@
-pub(crate) const BOARD_SIZE: usize = 4;
+pub const BOARD_SIZE: usize = 4;
diff --git a/src/game.rs b/src/game.rs
deleted file mode 100644
index 5b5b02e..0000000
--- a/src/game.rs
+++ /dev/null
@@ -1,720 +0,0 @@
-use std::{
-    collections::HashMap,
-    fmt::{self, Display, Formatter}, sync::Arc,
-};
-
-use button::Button;
-use color::UiColor;
-use macroquad::{math, prelude::*, rand};
-use shadow::draw_shadow;
-use sol_chess::{
-    board::{Board, BoardState},
-    generator::{self, RandomRange},
-};
-use sound::Sounds;
-use texture::PieceTexture;
-
-pub mod button;
-pub mod color;
-pub mod constants;
-pub mod shadow;
-pub mod sound;
-pub mod texture;
-
-pub struct MacroquadRandAdapter;
-impl RandomRange for MacroquadRandAdapter {
-    fn gen_range(&self, min: usize, max: usize) -> usize {
-        rand::gen_range(min, max)
-    }
-}
-
-pub struct Game {
-    // The generated puzzle. We keep a copy of this to reset the game.
-    original_board: Board,
-
-    // What is shown to the user
-    board: Board,
-
-    // Constants througout the game
-    texture_res: Texture2D,
-    sounds: Sounds,
-    font: Arc<Font>,
-    num_squares: usize,
-    heading_text: String,
-
-    // Update below on handle input
-    state: GameState,
-    debug: bool,
-    game_mode: GameMode,
-
-    // Update below on window resize
-    // Used for drawing the state
-    square_width: f32,
-    window_height: f32,
-    window_width: f32,
-    board_rect: Rect,
-    squares: Vec<GameSquare>,
-    heading_rect: Rect,
-    heading_font_size: f32,
-    gp_btns: HashMap<ButtonAction, Button>,
-    mode_btns: HashMap<GameMode, Button>,
-    rules: bool,
-    rules_btn: Vec<Button>,
-}
-
-struct GameSquare {
-    rect: Rect,
-    color: Color,
-    is_source: bool,
-    is_target: bool,
-    is_previous_target: bool,
-    i: usize,
-    j: usize,
-}
-
-#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
-pub enum ButtonAction {
-    Reset,
-    Next,
-}
-
-#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
-pub enum GameMode {
-    Easy,
-    Medium,
-    Hard,
-}
-
-#[derive(Copy, Clone)]
-enum GameState {
-    SelectSource(Option<(usize, usize)>),
-    SelectTarget((usize, usize)),
-    GameOver((usize, usize)),
-}
-
-impl Game {
-    pub fn new(texture_res: Texture2D, sounds: Sounds, font: Font) -> Self {
-        let num_squares: usize = 4;
-        let game_mode = GameMode::Medium;
-        let board = Game::generate_puzzle(game_mode);
-
-        Self {
-            original_board: board.clone(),
-            board,
-            board_rect: Rect::new(0., 0., 0., 0.),
-            squares: Vec::new(),
-            heading_rect: Rect::new(0., 0., 0., 0.),
-            heading_text: "Solitaire Chess".to_string(),
-            heading_font_size: 0.,
-            num_squares,
-            texture_res,
-            sounds,
-            state: GameState::SelectSource(None),
-            game_mode,
-            debug: false,
-            gp_btns: HashMap::new(),
-            mode_btns: HashMap::new(),
-            rules: false,
-            rules_btn: Vec::new(),
-            window_height: 0.,
-            window_width: 0.,
-            square_width: 0.,
-            font: Arc::new(font),
-        }
-    }
-
-    pub fn draw(&mut self) {
-        self.update_window_size();
-        self.draw_heading();
-        self.draw_board();
-        self.draw_buttons();
-        self.draw_debug();
-    }
-
-    fn update_window_size(&mut self) {
-        let new_height = math::clamp(screen_height(), 200.0, 10000.0);
-        let new_width = math::clamp(screen_width(), 200.0, 10000.0);
-        if new_height == self.window_height && new_width == self.window_width {
-            return;
-        }
-
-        self.window_height = new_height;
-        self.window_width = new_width;
-        self.update_drawables();
-    }
-
-    pub fn handle_input(&mut self) {
-        let mut gp_btn_clicked = None;
-        for btn in &mut self.gp_btns {
-            btn.1.handle_input();
-            if btn.1.is_clicked() {
-                gp_btn_clicked = Some(btn.0.clone());
-                break;
-            }
-        }
-
-        if let Some(action) = gp_btn_clicked {
-            match action {
-                ButtonAction::Reset => self.reset(),
-                ButtonAction::Next => self.next_puzzle(),
-            }
-        } else {
-            let mut mode_btn_clicked = None;
-            for btn in &mut self.mode_btns {
-                btn.1.handle_input();
-                if btn.1.is_clicked() {
-                    mode_btn_clicked = Some(btn);
-                    break;
-                }
-            }
-
-            if let Some(btn) = mode_btn_clicked {
-                self.game_mode = *btn.0;
-                self.next_puzzle();
-            } else {
-                let mut rules_btn_clicked = false;
-                for btn in &mut self.rules_btn {
-                    btn.handle_input();
-                    if btn.is_clicked() {
-                        rules_btn_clicked = true;
-                        break;
-                    }
-                }
-
-                if rules_btn_clicked {
-                    self.rules = !self.rules;
-                }
-            }
-        }
-
-        for btn in &mut self.mode_btns {
-            if self.game_mode == *btn.0 {
-                btn.1.is_active = false;
-            } else {
-                btn.1.is_active = true;
-            }
-        }
-
-        if is_key_released(KeyCode::Escape) {
-            if self.rules {
-                Sounds::play(&self.sounds.button);
-            }
-
-            self.rules = false;
-        }
-
-        if self.rules_btn.get(0).is_some() {
-            let rules_btn = &mut self.rules_btn[0];
-            if self.rules {
-                rules_btn.text = "Close".to_string();
-                rules_btn.color = UiColor::Green;
-            } else {
-                rules_btn.text = "Rules".to_string();
-                rules_btn.color = UiColor::Brown;
-            }
-        }
-
-        if is_key_released(KeyCode::D) {
-            self.debug = !self.debug;
-            return;
-        }
-
-        if is_key_released(KeyCode::Q) {
-            std::process::exit(0);
-        }
-
-        if is_mouse_button_released(MouseButton::Left) {
-            let current_state = self.state.clone();
-            let new_state = match current_state {
-                GameState::SelectSource(previous_target) => {
-                    self.handle_select_source(mouse_position(), previous_target)
-                }
-                GameState::SelectTarget(source) => {
-                    let next = self.handle_select_target(mouse_position(), source);
-                    if let GameState::SelectTarget(_) = next {
-                        self.reset_squares();
-                        GameState::SelectSource(None)
-                    } else {
-                        next
-                    }
-                }
-
-                GameState::GameOver(previous_target) => GameState::GameOver(previous_target),
-            };
-            self.state = new_state;
-            return;
-        }
-
-        if is_mouse_button_pressed(MouseButton::Left) {
-            let current_state = self.state.clone();
-            let new_state = match current_state {
-                GameState::SelectSource(previous_target) => {
-                    self.handle_select_source(mouse_position(), previous_target)
-                }
-                GameState::SelectTarget(source) => GameState::SelectTarget(source),
-                GameState::GameOver(previous_target) => GameState::GameOver(previous_target),
-            };
-
-            self.state = new_state;
-        }
-    }
-
-    fn draw_heading(&self) {
-        let f = self.heading_font_size.floor() as u16;
-        let dims = measure_text(self.heading_text.as_str(), Some(&self.font), f, 1.0);
-        let draw_text_params = TextParams {
-            font_size: f,
-            font: Some(&self.font),
-            color: BLACK,
-            ..Default::default()
-        };
-        draw_text_ex(
-            self.heading_text.as_str(),
-            self.heading_rect.x,
-            self.heading_rect.y + dims.offset_y,
-            draw_text_params,
-        );
-    }
-
-    fn draw_board(&self) {
-        let board_shadow_width = 0.1 * self.square_width;
-        draw_shadow(self.board_rect, board_shadow_width);
-
-        if self.rules {
-            draw_rectangle(
-                self.board_rect.x,
-                self.board_rect.y,
-                self.board_rect.w,
-                self.board_rect.h,
-                UiColor::Brown.to_bg_color(),
-            );
-
-            let font_size = self.heading_font_size * 0.6;
-            let rules = "\
-                Every move should be a \n\
-                capture. Win when only \n\
-                one piece is left.\n";
-            let measurement = measure_text(rules, Some(&self.font), font_size as u16, 1.0);
-            let draw_text_params = TextParams {
-                font_size: font_size as u16,
-                font: Some(&self.font),
-                color: UiColor::Brown.to_fg_color(),
-                ..Default::default()
-            };
-            draw_multiline_text_ex(
-                rules,
-                self.board_rect.x + 0.05 * self.square_width,
-                self.board_rect.y + 0.5 * (self.board_rect.h - measurement.height)
-                    - 2. * measurement.offset_y,
-                Some(2.),
-                draw_text_params,
-            );
-            return;
-        }
-
-        let sprite_size = 0.8 * self.square_width;
-        let mut selected_square = None;
-        self.squares.iter().for_each(|square| {
-            let color = match square.is_source {
-                true => square.color,
-                false => match square.is_target {
-                    true => UiColor::Pink.to_shadow_color(),
-                    false => square.color,
-                },
-            };
-
-            draw_rectangle(
-                square.rect.x,
-                square.rect.y,
-                square.rect.w,
-                square.rect.h,
-                color,
-            );
-
-            if let Some(p) = &self.board.cells[square.i][square.j] {
-                let offset = (square.rect.w - sprite_size) / 2.0;
-                let dtp = PieceTexture::for_piece(*p, sprite_size);
-                if !square.is_source {
-                    draw_texture_ex(
-                        &self.texture_res,
-                        square.rect.x + offset,
-                        square.rect.y + offset,
-                        WHITE,
-                        dtp,
-                    );
-                } else {
-                    selected_square = Some(square);
-                }
-            }
-        });
-
-        if let Some(selected_square) = selected_square {
-            if let Some(p) = self.board.cells[selected_square.i][selected_square.j] {
-                let dtp = PieceTexture::for_piece(p, sprite_size);
-                draw_texture_ex(
-                    &self.texture_res,
-                    mouse_position().0 - sprite_size / 2.0,
-                    mouse_position().1 - sprite_size / 2.0,
-                    WHITE,
-                    dtp,
-                );
-            }
-        }
-    }
-
-    fn draw_buttons(&mut self) {
-        for btn in &self.gp_btns {
-            btn.1.draw();
-        }
-
-        for btn in &self.mode_btns {
-            btn.1.draw();
-        }
-
-        for btn in &self.rules_btn {
-            btn.draw();
-        }
-    }
-
-    fn draw_debug(&self) {
-        if self.debug {
-            let mut debug_lines = vec![];
-            let (mx, my) = mouse_position();
-            let hover_square = self.squares.iter().find(|s| {
-                let c = Circle::new(mx, my, 0.0);
-                if c.overlaps_rect(&s.rect) {
-                    return true;
-                }
-                return false;
-            });
-            debug_lines.push(format!("Game State: {}", self.state));
-            debug_lines.push(format!("Board State: {}", self.board.game_state));
-            if let Some(hover_square) = hover_square {
-                debug_lines.push(format!("Hover: [ {}, {} ]", hover_square.i, hover_square.j));
-            }
-            self.add_debug_info(debug_lines);
-
-            self.show_fps();
-        }
-    }
-
-    fn get(&mut self, i: usize, j: usize) -> &mut GameSquare {
-        &mut self.squares[i * self.num_squares + j]
-    }
-
-    fn update_drawables(&mut self) {
-        let min_dimension = f32::min(self.window_height, self.window_width);
-        self.square_width = 0.15 * min_dimension;
-        let board_width = self.square_width * self.num_squares as f32;
-        let board_x = (self.window_width - board_width) / 2.0;
-        let board_y = (self.window_height - board_width) / 2.0;
-        self.board_rect = Rect::new(board_x, board_y, board_width, board_width);
-
-        self.heading_font_size = 0.07 * min_dimension;
-        let f = self.heading_font_size.floor() as u16;
-        let dims = measure_text(self.heading_text.as_str(), Some(&self.font), f, 1.0);
-        self.heading_rect = Rect::new(
-            board_x + (board_width - dims.width) / 2.0,
-            (board_y - dims.height) / 2.0,
-            dims.width,
-            dims.height,
-        );
-
-        let dark = UiColor::Brown.to_bg_color();
-        let light = UiColor::Yellow.to_bg_color();
-        let mut rects = Vec::new();
-        for i in 0..self.num_squares {
-            for j in 0..self.num_squares {
-                let x_eff = board_x + (i as f32 * self.square_width);
-                let y_eff = board_y + (j as f32 * self.square_width);
-                let rect = Rect::new(x_eff, y_eff, self.square_width, self.square_width);
-                let color = match (i + j) % 2 {
-                    1 => dark,
-                    _ => light,
-                };
-
-                rects.push(GameSquare {
-                    rect,
-                    color,
-                    i,
-                    j,
-                    is_source: false,
-                    is_target: false,
-                    is_previous_target: false,
-                });
-            }
-        }
-
-        self.squares = rects;
-
-        let btn_h = 0.08 * min_dimension;
-        let btn_w = board_width * 0.20;
-        let btn_y = board_width + board_y + 0.3 * self.square_width;
-        let btn_reset_x_offset = board_width / 2. + ((board_width / 4. - btn_w) / 2.);
-        let reset_btn = Button::new(
-            "Reset",
-            Rect::new(board_x + btn_reset_x_offset, btn_y, btn_w, btn_h),
-            UiColor::Yellow,
-            self.sounds.button.clone(),
-            self.font.clone(),
-        );
-
-        let btn_next_x_offset =
-            board_width / 2. + board_width / 4. + ((board_width / 4. - btn_w) / 2.);
-        let mut next_btn = Button::new(
-            "Next",
-            Rect::new(board_x + btn_next_x_offset, btn_y, btn_w, btn_h),
-            UiColor::Green,
-            self.sounds.button.clone(),
-            self.font.clone(),
-        );
-        next_btn.is_active = false;
-
-        let rules_button = Button::new(
-            "Rules",
-            Rect::new(
-                (board_x - btn_w) / 2.,
-                board_y + (self.square_width - btn_h) / 2.,
-                btn_w,
-                btn_h,
-            ),
-            UiColor::Brown,
-            self.sounds.button.clone(),
-            self.font.clone(),
-        );
-        self.rules_btn = vec![rules_button];
-
-        self.gp_btns = HashMap::new();
-        self.gp_btns.insert(ButtonAction::Next, next_btn);
-        self.gp_btns.insert(ButtonAction::Reset, reset_btn);
-
-        let easy_btn = Button::new(
-            "Easy",
-            Rect::new(
-                (board_x - btn_w) / 2.,
-                board_y + self.square_width + (self.square_width - btn_h) / 2.,
-                btn_w,
-                btn_h,
-            ),
-            UiColor::Yellow,
-            self.sounds.mode.clone(),
-            self.font.clone(),
-        );
-
-        let medium_btn = Button::new(
-            "Medium",
-            Rect::new(
-                (board_x - btn_w) / 2.,
-                board_y + 2. * self.square_width + (self.square_width - btn_h) / 2.,
-                btn_w,
-                btn_h,
-            ),
-            UiColor::Yellow,
-            self.sounds.mode.clone(),
-            self.font.clone(),
-        );
-
-        let hard_button = Button::new(
-            "Hard",
-            Rect::new(
-                (board_x - btn_w) / 2.,
-                board_y + 3. * self.square_width + (self.square_width - btn_h) / 2.,
-                btn_w,
-                btn_h,
-            ),
-            UiColor::Yellow,
-            self.sounds.mode.clone(),
-            self.font.clone(),
-        );
-
-        self.mode_btns = HashMap::new();
-        self.mode_btns.insert(GameMode::Easy, easy_btn);
-        self.mode_btns.insert(GameMode::Medium, medium_btn);
-        self.mode_btns.insert(GameMode::Hard, hard_button);
-
-        for btn in &mut self.mode_btns {
-            btn.1.is_active = true;
-            if self.game_mode == *btn.0 {
-                btn.1.is_active = false;
-            }
-        }
-    }
-
-    fn handle_select_source(
-        &mut self,
-        mouse_position: (f32, f32),
-        previous_target: Option<(usize, usize)>,
-    ) -> GameState {
-        self.reset_squares();
-        let (x, y) = mouse_position;
-        let mouse = Circle::new(x, y, 0.0);
-        let mut selected = None;
-        for square in &mut self.squares {
-            if mouse.overlaps_rect(&square.rect) {
-                if let Some(_) = self.board.cells[square.i][square.j] {
-                    selected = Some((square.i, square.j));
-                }
-            }
-        }
-
-        if let Some((i, j)) = selected {
-            self.get(i, j).is_source = true;
-            let mut target_squares = vec![];
-            for m in self.board.legal_moves.iter() {
-                if m.from.file == i && m.from.rank == j {
-                    target_squares.push((m.to.file, m.to.rank));
-                }
-            }
-
-            for (i, j) in target_squares {
-                self.get(i, j).is_target = true;
-            }
-
-            return GameState::SelectTarget(selected.unwrap());
-        }
-
-        if let Some((i, j)) = previous_target {
-            self.get(i, j).is_previous_target = true;
-        }
-
-        return GameState::SelectSource(None);
-    }
-
-    fn handle_select_target(
-        &mut self,
-        mouse_position: (f32, f32),
-        source: (usize, usize),
-    ) -> GameState {
-        let (x, y) = mouse_position;
-        let mouse = Circle::new(x, y, 0.0);
-
-        let mut selected = None;
-        for square in &mut self.squares {
-            if mouse.overlaps_rect(&square.rect) {
-                if let Some(_) = self.board.cells[square.i][square.j] {
-                    selected = Some((square.i, square.j));
-                }
-            }
-        }
-
-        let (s_x, s_y) = source;
-        let Some((x, y)) = selected else {
-            self.get(s_x, s_y).is_source = true;
-            return GameState::SelectTarget(source);
-        };
-
-        if x == s_x && y == s_y {
-            self.get(s_x, s_y).is_source = true;
-            return GameState::SelectTarget(source);
-        }
-
-        let mut is_legal = false;
-        if self.get(x, y).is_target {
-            is_legal = true;
-        }
-
-        if is_legal {
-            let m = self.board.legal_moves.iter().find(|m| {
-                m.from.file == s_x && m.from.rank == s_y && m.to.file == x && m.to.rank == y
-            });
-
-            let m = m.expect("legal move should be found");
-            self.board.make_move(m.clone());
-
-            if self.board.game_state == BoardState::Won || self.board.game_state == BoardState::Lost
-            {
-                self.reset_squares();
-                if self.board.game_state == BoardState::Won {
-                    let next_btn = self
-                        .gp_btns
-                        .get_mut(&ButtonAction::Next)
-                        .expect("Cannot find next button");
-                    next_btn.is_active = true;
-                    Sounds::play(&self.sounds.win);
-                } else {
-                    Sounds::play(&self.sounds.loss);
-                }
-
-                return GameState::GameOver((x, y));
-            }
-
-            self.reset_squares();
-            self.get(x, y).is_target = true;
-            Sounds::play(&self.sounds.click);
-            return GameState::SelectSource(Some((x, y)));
-        }
-
-        self.reset_squares();
-        return GameState::SelectSource(None);
-    }
-
-    fn reset(&mut self) {
-        self.board = self.original_board.clone();
-        self.reset_squares();
-
-        let next_button = self
-            .gp_btns
-            .get_mut(&ButtonAction::Next)
-            .expect("Cannot find next button");
-        next_button.is_active = false;
-
-        self.state = GameState::SelectSource(None);
-    }
-
-    fn next_puzzle(&mut self) {
-        self.reset();
-        let board = Game::generate_puzzle(self.game_mode);
-        self.original_board = board.clone();
-        self.board = board;
-    }
-
-    fn reset_squares(&mut self) {
-        for i in 0..self.num_squares {
-            for j in 0..self.num_squares {
-                self.get(i, j).is_source = false;
-                self.get(i, j).is_target = false;
-            }
-        }
-    }
-
-    fn add_debug_info(&self, lines: Vec<String>) {
-        let mut y = 20.0;
-        for line in lines {
-            draw_text(&line, 10.0, y, 20.0, BLACK);
-            y += 25.0;
-        }
-    }
-
-    fn show_fps(&self) {
-        let fps = get_fps();
-        draw_text(
-            &format!("FPS: {}", fps),
-            10.0,
-            screen_height() - 20.0,
-            20.0,
-            BLACK,
-        );
-    }
-
-    fn generate_puzzle(mode: GameMode) -> Board {
-        let piece_count = match mode {
-            GameMode::Easy => 3,
-            GameMode::Medium => 5,
-            GameMode::Hard => 7,
-        };
-
-        let generate = generator::generate(piece_count, 100, &MacroquadRandAdapter);
-        generate.board().expect("No puzzle was generated")
-    }
-}
-
-impl Display for GameState {
-    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-        match self {
-            GameState::SelectSource(Some(x)) => write!(f, "Select Source [ {}, {} ]", x.0, x.1),
-            GameState::SelectSource(None) => write!(f, "Select Source [ ]"),
-            GameState::SelectTarget(x) => write!(f, "Select Target [ {}, {} ]", x.0, x.1),
-            GameState::GameOver(x) => write!(f, "Game Over [ {}, {} ]", x.0, x.1),
-        }
-    }
-}
diff --git a/src/game/constants.rs b/src/game/constants.rs
deleted file mode 100644
index a2204fa..0000000
--- a/src/game/constants.rs
+++ /dev/null
@@ -1 +0,0 @@
-pub(crate) const VOLUME: f32 = 0.3; // Between 0 and 1
diff --git a/src/lib.rs b/src/lib.rs
index f1f42dd..b9ffdb8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
 pub mod board;
 pub mod generator;
 pub mod solver;
-pub mod util;
+mod util;