DIY ESP32 15 Puzzle game on TFT touch Dispaly

This is an extremely simple way to make this fun puzzle game, which only requires three components, and will provide you with many hours of fun.

May 8, 2025

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Games

Toys

Kids

Components and supplies

TFT LCD 2.8" touch screen

ESP32

Piezo Buzzer

Tools and machines

Soldering kit

Apps and platforms

Arduino IDE 2.0 (beta)

Project description

Code

Code 15 puzzle

cpp

...

1//-----------------------------------------------------
2// 15 Puzzle Game  3.2"-Display
3// by: mircemk
4// License: GNU GPl 3.0
5// Created: 2025-03-27 20:52:34
6//-----------------------------------------------------
7
8#include <SPI.h>
9#include <TFT_eSPI.h>
10TFT_eSPI tft = TFT_eSPI();
11
12// Game board configuration
13#define GRID_SIZE 4
14#define TILE_SIZE 54     // Increased by 1 pixel
15#define TILE_SPACING 2
16#define GRID_START_X 10
17#define GRID_START_Y 9
18
19// Button configuration
20#define BUTTON_W 100
21#define BUTTON_H 50
22#define START_BTN_X 110   // Centered start button for welcome screen
23#define START_BTN_Y 145
24
25// Right side menu buttons
26#define MENU_BTN_W 75
27#define MENU_BTN_H 71
28#define MENU_BTN_X 236
29#define MENU_BTN_Y1 9    // First button
30#define MENU_BTN_Y2 85   // Second button
31#define MENU_BTN_Y3 160   // Third button
32
33// Sound configuration
34#define SOUND_PIN 2
35#define GAME_START_DELAY 1000
36
37// Colors
38#define TILE_COLOR TFT_BLUE
39#define TILE_TEXT_COLOR TFT_WHITE
40#define EMPTY_COLOR TFT_BLACK
41#define GRID_COLOR TFT_DARKGREY
42
43// Board colors array
44const uint16_t boardColors[] = {
45    0x001F,  // Blue
46    0xFDA0,  // Orange
47    0xF800,  // Red
48    0x7BE0,  //  Olivie
49    0xF81F   // Magenta
50};
51int currentColorIndex = 0;
52
53// Game state variables
54uint16_t pixel_x, pixel_y;
55byte gameBoard[GRID_SIZE][GRID_SIZE];
56int emptyTileX = GRID_SIZE - 1;
57int emptyTileY = GRID_SIZE - 1;
58bool gameStarted = false;
59int moves = 0;
60int iEnableButtons = 1;
61unsigned long lastSoundTime = 0;
62bool soundEnabled = true;
63unsigned long lastButtonPress = 0;
64#define BUTTON_DEBOUNCE_TIME 250  // 250ms debounce
65
66// Function prototypes
67void showWelcomeScreen();
68void drawFrame(int size, uint16_t color);
69void initializeGame();
70void drawBoard();
71void drawTile(int x, int y);
72void drawMenuButtons();
73bool isValidMove(int x, int y);
74void moveTile(int x, int y);
75void silentMoveTile(int x, int y);
76void shuffleBoard();
77void handleGameTouch();
78void checkMenuButtons();
79bool checkWin();
80void gameWon();
81void playSound(int type);
82void updateMovesDisplay();
83void changeBoardColor();
84
85void setup() {
86    uint16_t calibrationData[5];
87    pinMode(15, OUTPUT);
88    digitalWrite(15, LOW);
89    Serial.begin(115200);
90    
91    tft.init();
92    tft.setRotation(1);
93    tft.fillScreen((0xFFFF));
94    
95    // Calibration screen
96    tft.setCursor(40, 20, 2);
97    tft.setTextColor(TFT_RED, TFT_WHITE);
98    tft.setTextSize(2);
99    tft.println("Calibration of");
100    tft.setCursor(40, 60, 2);
101    tft.println("Display");
102    tft.setTextColor(TFT_BLACK, TFT_WHITE);
103    tft.setCursor(40, 100, 2);
104    tft.println("Touch");
105    tft.setCursor(40, 140, 2);
106    tft.println("the indicated corners");
107    tft.calibrateTouch(calibrationData, TFT_GREEN, TFT_RED, 15);
108    
109    showWelcomeScreen();
110}
111
112void loop() {
113    static uint16_t color;
114    if (tft.getTouch(&pixel_x, &pixel_y) && iEnableButtons) {
115        if (!gameStarted) {
116            if (pixel_x > START_BTN_X && pixel_x < (START_BTN_X + BUTTON_W) &&
117                pixel_y > START_BTN_Y && pixel_y < (START_BTN_Y + BUTTON_H)) {
118                
119                iEnableButtons = 0;
120                
121                while(tft.getTouch(&pixel_x, &pixel_y)) {
122                    delay(10);
123                }
124                
125                playSound(1);
126                delay(GAME_START_DELAY);
127                
128                tft.fillScreen(TFT_BLACK);
129                initializeGame();
130                shuffleBoard();
131                gameStarted = true;
132                
133                while(tft.getTouch(&pixel_x, &pixel_y)) {
134                    delay(10);
135                }
136                
137                delay(250);
138                iEnableButtons = 1;
139            }
140        } else {
141            handleGameTouch();
142            checkMenuButtons();
143        }
144    }
145}
146
147void changeBoardColor() {
148    currentColorIndex = (currentColorIndex + 1) % 5;
149    for (int y = 0; y < GRID_SIZE; y++) {
150        for (int x = 0; x < GRID_SIZE; x++) {
151            if (gameBoard[y][x] != 0) {
152                int pixelX = GRID_START_X + x * (TILE_SIZE + TILE_SPACING);
153                int pixelY = GRID_START_Y + y * (TILE_SIZE + TILE_SPACING);
154                tft.fillRect(pixelX, pixelY, TILE_SIZE, TILE_SIZE, boardColors[currentColorIndex]);
155                
156                tft.setTextColor(TILE_TEXT_COLOR);
157                tft.setTextSize(2);
158                String number = String(gameBoard[y][x]);
159                int textWidth = number.length() * 12;
160                int textHeight = 14;
161                int textX = pixelX + (TILE_SIZE - textWidth) / 2;
162                int textY = pixelY + (TILE_SIZE - textHeight) / 2;
163                tft.setCursor(textX, textY);
164                tft.print(number);
165            }
166        }
167    }
168}
169
170void playSound(int type) {
171    if (!soundEnabled) return;
172    
173    switch(type) {
174        case 0: // Tile move sound
175            tone(SOUND_PIN, 200, 50);  // Short 200Hz beep
176            break;
177            
178        case 1: // Game start sound
179            soundEnabled = false;
180            tone(SOUND_PIN, 400, 200);
181            delay(250);
182            tone(SOUND_PIN, 600, 200);
183            delay(250);
184            tone(SOUND_PIN, 800, 400);
185            delay(500);
186            soundEnabled = true;
187            break;
188            
189        case 2: // Win sound
190            soundEnabled = false;
191            tone(SOUND_PIN, 800, 200);
192            delay(200);
193            tone(SOUND_PIN, 1000, 200);
194            delay(200);
195            tone(SOUND_PIN, 1200, 400);
196            delay(500);
197            soundEnabled = true;
198            break;
199    }
200}
201
202void updateMovesDisplay() {
203    // Clear the previous number with MAROON background
204    tft.fillRect(MENU_BTN_X + 1, MENU_BTN_Y1 + 35, MENU_BTN_W - 2, 20, TFT_MAROON);
205    
206    tft.setTextColor(TFT_WHITE);
207    tft.setTextSize(1);
208    
209    String movesStr = String(moves);
210    int textWidth = movesStr.length() * 6;
211    
212    tft.setCursor(MENU_BTN_X + (MENU_BTN_W - textWidth) / 2, MENU_BTN_Y1 + 35);
213    tft.print(movesStr);
214}
215
216void showWelcomeScreen() {
217    tft.fillScreen(TFT_BLACK);
218    drawFrame(5, TFT_RED);
219    
220    tft.setTextColor(TFT_YELLOW);
221    tft.setTextSize(4);
222    tft.setCursor(130, 10);
223    tft.print("15");
224    tft.setCursor(75, 70);
225    tft.print("PUZZLE");
226    
227    tft.fillRect(START_BTN_X, START_BTN_Y, BUTTON_W, BUTTON_H, TFT_RED);
228    tft.setTextColor(TFT_WHITE);
229    tft.setTextSize(2);
230    tft.setCursor(START_BTN_X + 10, START_BTN_Y + 10);
231    tft.print("START");
232}
233
234void drawFrame(int size, uint16_t color) {
235    for (int i = 0; i < size; i++) {
236        tft.drawRect(i, i, 320-i*2, 240-i*2, color);
237    }
238}
239
240void initializeGame() {
241    tft.fillScreen(TFT_BLACK);
242    drawFrame(5, TFT_RED);
243    
244    emptyTileX = GRID_SIZE - 1;
245    emptyTileY = GRID_SIZE - 1;
246    moves = 0;
247    currentColorIndex = 0;  // Reset color to first color
248    
249    int value = 1;
250    for (int y = 0; y < GRID_SIZE; y++) {
251        for (int x = 0; x < GRID_SIZE; x++) {
252            if (x == GRID_SIZE-1 && y == GRID_SIZE-1) {
253                gameBoard[y][x] = 0;
254            } else {
255                gameBoard[y][x] = value++;
256            }
257        }
258    }
259    
260    drawBoard();
261    drawMenuButtons();
262}
263
264void drawBoard() {
265    for (int y = 0; y < GRID_SIZE; y++) {
266        for (int x = 0; x < GRID_SIZE; x++) {
267            drawTile(x, y);
268        }
269    }
270}
271
272void drawTile(int x, int y) {
273    int pixelX = GRID_START_X + x * (TILE_SIZE + TILE_SPACING);
274    int pixelY = GRID_START_Y + y * (TILE_SIZE + TILE_SPACING);
275    
276    if (gameBoard[y][x] == 0) {
277        tft.fillRect(pixelX, pixelY, TILE_SIZE, TILE_SIZE, EMPTY_COLOR);
278    } else {
279        tft.fillRect(pixelX, pixelY, TILE_SIZE, TILE_SIZE, boardColors[currentColorIndex]);
280        tft.setTextColor(TILE_TEXT_COLOR);
281        tft.setTextSize(2);
282        
283        String number = String(gameBoard[y][x]);
284        int textWidth = number.length() * 12;
285        int textHeight = 14;
286        
287        int textX = pixelX + (TILE_SIZE - textWidth) / 2;
288        int textY = pixelY + (TILE_SIZE - textHeight) / 2;
289        
290        tft.setCursor(textX, textY);
291        tft.print(number);
292    }
293}
294
295void drawMenuButtons() {
296    // Draw three menu buttons on the right
297    for(int i = 0; i < 3; i++) {
298        int y_pos;
299        switch(i) {
300            case 0: y_pos = MENU_BTN_Y1; break;
301            case 1: y_pos = MENU_BTN_Y2; break;
302            case 2: y_pos = MENU_BTN_Y3; break;
303        }
304        
305        // Set different colors for each button
306        uint16_t buttonColor;
307        if (i == 0) buttonColor = TFT_MAROON;      // Moves button
308        else if (i == 1) buttonColor = TFT_BLUE;   // Color change button
309        else buttonColor = TFT_DARKGREEN;          // New game button
310        
311        tft.fillRect(MENU_BTN_X, y_pos, MENU_BTN_W, MENU_BTN_H, buttonColor);
312        tft.drawRect(MENU_BTN_X, y_pos, MENU_BTN_W, MENU_BTN_H, TFT_WHITE);
313        
314        if (i == 0) {  // Top button - Moves counter
315            tft.setTextColor(TFT_WHITE);
316            tft.setTextSize(1);
317            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 30) / 2, y_pos + 15);
318            tft.print("MOVES");
319            updateMovesDisplay();
320        }
321        else if (i == 1) {  // Middle button - Color changer
322            tft.setTextColor(TFT_WHITE);
323            tft.setTextSize(1);
324            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 30) / 2, y_pos + 15);
325            tft.print("COLOR");
326            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 36) / 2, y_pos + 35);
327            tft.print("CHANGE");
328        }
329        else if (i == 2) {  // Bottom button - NEW GAME
330            tft.setTextColor(TFT_WHITE);
331            tft.setTextSize(1);
332            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 18) / 2, y_pos + 20);
333            tft.print("NEW");
334            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 24) / 2, y_pos + 40);
335            tft.print("GAME");
336        }
337    }
338}
339
340void handleGameTouch() {
341    int tileX = (pixel_x - GRID_START_X) / (TILE_SIZE + TILE_SPACING);
342    int tileY = (pixel_y - GRID_START_Y) / (TILE_SIZE + TILE_SPACING);
343    
344    if (tileX >= 0 && tileX < GRID_SIZE && tileY >= 0 && tileY < GRID_SIZE) {
345        if (isValidMove(tileX, tileY)) {
346            moveTile(tileX, tileY);
347            moves++;
348            updateMovesDisplay();
349            
350            if (checkWin()) {
351                gameWon();
352            }
353        }
354    }
355}
356
357void checkMenuButtons() {
358    unsigned long currentTime = millis();
359    
360    if (currentTime - lastButtonPress < BUTTON_DEBOUNCE_TIME) {
361        return;
362    }
363    
364    if (pixel_x >= MENU_BTN_X && pixel_x < (MENU_BTN_X + MENU_BTN_W)) {
365        if (pixel_y >= MENU_BTN_Y1 && pixel_y < (MENU_BTN_Y1 + MENU_BTN_H)) {
366            playSound(0);
367            lastButtonPress = currentTime;
368            
369            while(tft.getTouch(&pixel_x, &pixel_y)) {
370                delay(10);
371            }
372        }
373        else if (pixel_y >= MENU_BTN_Y2 && pixel_y < (MENU_BTN_Y2 + MENU_BTN_H)) {
374            playSound(0);
375            changeBoardColor();
376            lastButtonPress = currentTime;
377            
378            while(tft.getTouch(&pixel_x, &pixel_y)) {
379                delay(10);
380            }
381        }
382        else if (pixel_y >= MENU_BTN_Y3 && pixel_y < (MENU_BTN_Y3 + MENU_BTN_H)) {
383            iEnableButtons = 0;
384            
385            while(tft.getTouch(&pixel_x, &pixel_y)) {
386                delay(10);
387            }
388            
389            playSound(1);
390            delay(GAME_START_DELAY);
391            
392            initializeGame();
393            shuffleBoard();
394            gameStarted = true;
395            
396            while(tft.getTouch(&pixel_x, &pixel_y)) {
397                delay(10);
398            }
399            
400            delay(250);
401            iEnableButtons = 1;
402            lastButtonPress = currentTime;
403        }
404    }
405}
406
407bool isValidMove(int x, int y) {
408    return (
409        (abs(x - emptyTileX) == 1 && y == emptyTileY) ||
410        (abs(y - emptyTileY) == 1 && x == emptyTileX)
411    );
412}
413
414void moveTile(int x, int y) {
415    gameBoard[emptyTileY][emptyTileX] = gameBoard[y][x];
416    gameBoard[y][x] = 0;
417    drawTile(emptyTileX, emptyTileY);
418    drawTile(x, y);
419    emptyTileX = x;
420    emptyTileY = y;
421    playSound(0);
422}
423
424void silentMoveTile(int x, int y) {
425    gameBoard[emptyTileY][emptyTileX] = gameBoard[y][x];
426    gameBoard[y][x] = 0;
427    emptyTileX = x;
428    emptyTileY = y;
429}
430
431void shuffleBoard() {
432    iEnableButtons = 0;
433    soundEnabled = false;
434    
435    randomSeed(analogRead(34));
436    for (int i = 0; i < 200; i++) {
437        int direction = random(4);
438        int newX = emptyTileX;
439        int newY = emptyTileY;
440        
441        switch (direction) {
442            case 0: newY--; break;
443            case 1: newY++; break;
444            case 2: newX--; break;
445            case 3: newX++; break;
446        }
447        
448        if (newX >= 0 && newX < GRID_SIZE && newY >= 0 && newY < GRID_SIZE) {
449            silentMoveTile(newX, newY);
450        }
451    }
452    
453    drawBoard();
454    
455    delay(250);
456    soundEnabled = true;
457    iEnableButtons = 1;
458}
459
460bool checkWin() {
461    int value = 1;
462    for (int y = 0; y < GRID_SIZE; y++) {
463        for (int x = 0; x < GRID_SIZE; x++) {
464            if (y == GRID_SIZE-1 && x == GRID_SIZE-1) {
465                if (gameBoard[y][x] != 0) return false;
466            } else {
467                if (gameBoard[y][x] != value++) return false;
468            }
469        }
470    }
471    return true;
472}
473
474void gameWon() {
475    tft.fillScreen(TFT_BLACK);
476    drawFrame(10, TFT_GREEN);
477    
478    tft.setTextColor(TFT_YELLOW);
479    tft.setTextSize(2);
480    tft.setCursor(60, 60);
481    tft.print("PUZZLE SOLVED!");
482    
483    tft.setTextSize(2);
484    tft.setCursor(80, 120);
485    tft.print("Moves: ");
486    tft.print(moves);
487    
488    tft.setTextSize(1);
489    tft.setCursor(85, 180);
490    tft.print("Touch screen to continue");
491    
492    playSound(2);
493    
494    while(tft.getTouch(&pixel_x, &pixel_y)) {
495        delay(10);
496    }
497    
498    while(!tft.getTouch(&pixel_x, &pixel_y)) {
499        delay(10);
500    }
501    
502    gameStarted = false;
503    moves = 0;
504    showWelcomeScreen();
505}

//-----------------------------------------------------
// 15 Puzzle Game  3.2"-Display
// by: mircemk
// License: GNU GPl 3.0
// Created: 2025-03-27 20:52:34
//-----------------------------------------------------

#include <SPI.h>
#include <TFT_eSPI.h>
TFT_eSPI tft = TFT_eSPI();

// Game board configuration
#define GRID_SIZE 4
#define TILE_SIZE 54     // Increased by 1 pixel
#define TILE_SPACING 2
#define GRID_START_X 10
#define GRID_START_Y 9

// Button configuration
#define BUTTON_W 100
#define BUTTON_H 50
#define START_BTN_X 110   // Centered start button for welcome screen
#define START_BTN_Y 145

// Right side menu buttons
#define MENU_BTN_W 75
#define MENU_BTN_H 71
#define MENU_BTN_X 236
#define MENU_BTN_Y1 9    // First button
#define MENU_BTN_Y2 85   // Second button
#define MENU_BTN_Y3 160   // Third button

// Sound configuration
#define SOUND_PIN 2
#define GAME_START_DELAY 1000

// Colors
#define TILE_COLOR TFT_BLUE
#define TILE_TEXT_COLOR TFT_WHITE
#define EMPTY_COLOR TFT_BLACK
#define GRID_COLOR TFT_DARKGREY

// Board colors array
const uint16_t boardColors[] = {
    0x001F,  // Blue
    0xFDA0,  // Orange
    0xF800,  // Red
    0x7BE0,  //  Olivie
    0xF81F   // Magenta
};
int currentColorIndex = 0;

// Game state variables
uint16_t pixel_x, pixel_y;
byte gameBoard[GRID_SIZE][GRID_SIZE];
int emptyTileX = GRID_SIZE - 1;
int emptyTileY = GRID_SIZE - 1;
bool gameStarted = false;
int moves = 0;
int iEnableButtons = 1;
unsigned long lastSoundTime = 0;
bool soundEnabled = true;
unsigned long lastButtonPress = 0;
#define BUTTON_DEBOUNCE_TIME 250  // 250ms debounce

// Function prototypes
void showWelcomeScreen();
void drawFrame(int size, uint16_t color);
void initializeGame();
void drawBoard();
void drawTile(int x, int y);
void drawMenuButtons();
bool isValidMove(int x, int y);
void moveTile(int x, int y);
void silentMoveTile(int x, int y);
void shuffleBoard();
void handleGameTouch();
void checkMenuButtons();
bool checkWin();
void gameWon();
void playSound(int type);
void updateMovesDisplay();
void changeBoardColor();

void setup() {
    uint16_t calibrationData[5];
    pinMode(15, OUTPUT);
    digitalWrite(15, LOW);
    Serial.begin(115200);
    
    tft.init();
    tft.setRotation(1);
    tft.fillScreen((0xFFFF));
    
    // Calibration screen
    tft.setCursor(40, 20, 2);
    tft.setTextColor(TFT_RED, TFT_WHITE);
    tft.setTextSize(2);
    tft.println("Calibration of");
    tft.setCursor(40, 60, 2);
    tft.println("Display");
    tft.setTextColor(TFT_BLACK, TFT_WHITE);
    tft.setCursor(40, 100, 2);
    tft.println("Touch");
    tft.setCursor(40, 140, 2);
    tft.println("the indicated corners");
    tft.calibrateTouch(calibrationData, TFT_GREEN, TFT_RED, 15);
    
    showWelcomeScreen();
}

void loop() {
    static uint16_t color;
    if (tft.getTouch(&pixel_x, &pixel_y) && iEnableButtons) {
        if (!gameStarted) {
            if (pixel_x > START_BTN_X && pixel_x < (START_BTN_X + BUTTON_W) &&
                pixel_y > START_BTN_Y && pixel_y < (START_BTN_Y + BUTTON_H)) {
                
                iEnableButtons = 0;
                
                while(tft.getTouch(&pixel_x, &pixel_y)) {
                    delay(10);
                }
                
                playSound(1);
                delay(GAME_START_DELAY);
                
                tft.fillScreen(TFT_BLACK);
                initializeGame();
                shuffleBoard();
                gameStarted = true;
                
                while(tft.getTouch(&pixel_x, &pixel_y)) {
                    delay(10);
                }
                
                delay(250);
                iEnableButtons = 1;
            }
        } else {
            handleGameTouch();
            checkMenuButtons();
        }
    }
}

void changeBoardColor() {
    currentColorIndex = (currentColorIndex + 1) % 5;
    for (int y = 0; y < GRID_SIZE; y++) {
        for (int x = 0; x < GRID_SIZE; x++) {
            if (gameBoard[y][x] != 0) {
                int pixelX = GRID_START_X + x * (TILE_SIZE + TILE_SPACING);
                int pixelY = GRID_START_Y + y * (TILE_SIZE + TILE_SPACING);
                tft.fillRect(pixelX, pixelY, TILE_SIZE, TILE_SIZE, boardColors[currentColorIndex]);
                
                tft.setTextColor(TILE_TEXT_COLOR);
                tft.setTextSize(2);
                String number = String(gameBoard[y][x]);
                int textWidth = number.length() * 12;
                int textHeight = 14;
                int textX = pixelX + (TILE_SIZE - textWidth) / 2;
                int textY = pixelY + (TILE_SIZE - textHeight) / 2;
                tft.setCursor(textX, textY);
                tft.print(number);
            }
        }
    }
}

void playSound(int type) {
    if (!soundEnabled) return;
    
    switch(type) {
        case 0: // Tile move sound
            tone(SOUND_PIN, 200, 50);  // Short 200Hz beep
            break;
            
        case 1: // Game start sound
            soundEnabled = false;
            tone(SOUND_PIN, 400, 200);
            delay(250);
            tone(SOUND_PIN, 600, 200);
            delay(250);
            tone(SOUND_PIN, 800, 400);
            delay(500);
            soundEnabled = true;
            break;
            
        case 2: // Win sound
            soundEnabled = false;
            tone(SOUND_PIN, 800, 200);
            delay(200);
            tone(SOUND_PIN, 1000, 200);
            delay(200);
            tone(SOUND_PIN, 1200, 400);
            delay(500);
            soundEnabled = true;
            break;
    }
}

void updateMovesDisplay() {
    // Clear the previous number with MAROON background
    tft.fillRect(MENU_BTN_X + 1, MENU_BTN_Y1 + 35, MENU_BTN_W - 2, 20, TFT_MAROON);
    
    tft.setTextColor(TFT_WHITE);
    tft.setTextSize(1);
    
    String movesStr = String(moves);
    int textWidth = movesStr.length() * 6;
    
    tft.setCursor(MENU_BTN_X + (MENU_BTN_W - textWidth) / 2, MENU_BTN_Y1 + 35);
    tft.print(movesStr);
}

void showWelcomeScreen() {
    tft.fillScreen(TFT_BLACK);
    drawFrame(5, TFT_RED);
    
    tft.setTextColor(TFT_YELLOW);
    tft.setTextSize(4);
    tft.setCursor(130, 10);
    tft.print("15");
    tft.setCursor(75, 70);
    tft.print("PUZZLE");
    
    tft.fillRect(START_BTN_X, START_BTN_Y, BUTTON_W, BUTTON_H, TFT_RED);
    tft.setTextColor(TFT_WHITE);
    tft.setTextSize(2);
    tft.setCursor(START_BTN_X + 10, START_BTN_Y + 10);
    tft.print("START");
}

void drawFrame(int size, uint16_t color) {
    for (int i = 0; i < size; i++) {
        tft.drawRect(i, i, 320-i*2, 240-i*2, color);
    }
}

void initializeGame() {
    tft.fillScreen(TFT_BLACK);
    drawFrame(5, TFT_RED);
    
    emptyTileX = GRID_SIZE - 1;
    emptyTileY = GRID_SIZE - 1;
    moves = 0;
    currentColorIndex = 0;  // Reset color to first color
    
    int value = 1;
    for (int y = 0; y < GRID_SIZE; y++) {
        for (int x = 0; x < GRID_SIZE; x++) {
            if (x == GRID_SIZE-1 && y == GRID_SIZE-1) {
                gameBoard[y][x] = 0;
            } else {
                gameBoard[y][x] = value++;
            }
        }
    }
    
    drawBoard();
    drawMenuButtons();
}

void drawBoard() {
    for (int y = 0; y < GRID_SIZE; y++) {
        for (int x = 0; x < GRID_SIZE; x++) {
            drawTile(x, y);
        }
    }
}

void drawTile(int x, int y) {
    int pixelX = GRID_START_X + x * (TILE_SIZE + TILE_SPACING);
    int pixelY = GRID_START_Y + y * (TILE_SIZE + TILE_SPACING);
    
    if (gameBoard[y][x] == 0) {
        tft.fillRect(pixelX, pixelY, TILE_SIZE, TILE_SIZE, EMPTY_COLOR);
    } else {
        tft.fillRect(pixelX, pixelY, TILE_SIZE, TILE_SIZE, boardColors[currentColorIndex]);
        tft.setTextColor(TILE_TEXT_COLOR);
        tft.setTextSize(2);
        
        String number = String(gameBoard[y][x]);
        int textWidth = number.length() * 12;
        int textHeight = 14;
        
        int textX = pixelX + (TILE_SIZE - textWidth) / 2;
        int textY = pixelY + (TILE_SIZE - textHeight) / 2;
        
        tft.setCursor(textX, textY);
        tft.print(number);
    }
}

void drawMenuButtons() {
    // Draw three menu buttons on the right
    for(int i = 0; i < 3; i++) {
        int y_pos;
        switch(i) {
            case 0: y_pos = MENU_BTN_Y1; break;
            case 1: y_pos = MENU_BTN_Y2; break;
            case 2: y_pos = MENU_BTN_Y3; break;
        }
        
        // Set different colors for each button
        uint16_t buttonColor;
        if (i == 0) buttonColor = TFT_MAROON;      // Moves button
        else if (i == 1) buttonColor = TFT_BLUE;   // Color change button
        else buttonColor = TFT_DARKGREEN;          // New game button
        
        tft.fillRect(MENU_BTN_X, y_pos, MENU_BTN_W, MENU_BTN_H, buttonColor);
        tft.drawRect(MENU_BTN_X, y_pos, MENU_BTN_W, MENU_BTN_H, TFT_WHITE);
        
        if (i == 0) {  // Top button - Moves counter
            tft.setTextColor(TFT_WHITE);
            tft.setTextSize(1);
            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 30) / 2, y_pos + 15);
            tft.print("MOVES");
            updateMovesDisplay();
        }
        else if (i == 1) {  // Middle button - Color changer
            tft.setTextColor(TFT_WHITE);
            tft.setTextSize(1);
            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 30) / 2, y_pos + 15);
            tft.print("COLOR");
            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 36) / 2, y_pos + 35);
            tft.print("CHANGE");
        }
        else if (i == 2) {  // Bottom button - NEW GAME
            tft.setTextColor(TFT_WHITE);
            tft.setTextSize(1);
            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 18) / 2, y_pos + 20);
            tft.print("NEW");
            tft.setCursor(MENU_BTN_X + (MENU_BTN_W - 24) / 2, y_pos + 40);
            tft.print("GAME");
        }
    }
}

void handleGameTouch() {
    int tileX = (pixel_x - GRID_START_X) / (TILE_SIZE + TILE_SPACING);
    int tileY = (pixel_y - GRID_START_Y) / (TILE_SIZE + TILE_SPACING);
    
    if (tileX >= 0 && tileX < GRID_SIZE && tileY >= 0 && tileY < GRID_SIZE) {
        if (isValidMove(tileX, tileY)) {
            moveTile(tileX, tileY);
            moves++;
            updateMovesDisplay();
            
            if (checkWin()) {
                gameWon();
            }
        }
    }
}

void checkMenuButtons() {
    unsigned long currentTime = millis();
    
    if (currentTime - lastButtonPress < BUTTON_DEBOUNCE_TIME) {
        return;
    }
    
    if (pixel_x >= MENU_BTN_X && pixel_x < (MENU_BTN_X + MENU_BTN_W)) {
        if (pixel_y >= MENU_BTN_Y1 && pixel_y < (MENU_BTN_Y1 + MENU_BTN_H)) {
            playSound(0);
            lastButtonPress = currentTime;
            
            while(tft.getTouch(&pixel_x, &pixel_y)) {
                delay(10);
            }
        }
        else if (pixel_y >= MENU_BTN_Y2 && pixel_y < (MENU_BTN_Y2 + MENU_BTN_H)) {
            playSound(0);
            changeBoardColor();
            lastButtonPress = currentTime;
            
            while(tft.getTouch(&pixel_x, &pixel_y)) {
                delay(10);
            }
        }
        else if (pixel_y >= MENU_BTN_Y3 && pixel_y < (MENU_BTN_Y3 + MENU_BTN_H)) {
            iEnableButtons = 0;
            
            while(tft.getTouch(&pixel_x, &pixel_y)) {
                delay(10);
            }
            
            playSound(1);
            delay(GAME_START_DELAY);
            
            initializeGame();
            shuffleBoard();
            gameStarted = true;
            
            while(tft.getTouch(&pixel_x, &pixel_y)) {
                delay(10);
            }
            
            delay(250);
            iEnableButtons = 1;
            lastButtonPress = currentTime;
        }
    }
}

bool isValidMove(int x, int y) {
    return (
        (abs(x - emptyTileX) == 1 && y == emptyTileY) ||
        (abs(y - emptyTileY) == 1 && x == emptyTileX)
    );
}

void moveTile(int x, int y) {
    gameBoard[emptyTileY][emptyTileX] = gameBoard[y][x];
    gameBoard[y][x] = 0;
    drawTile(emptyTileX, emptyTileY);
    drawTile(x, y);
    emptyTileX = x;
    emptyTileY = y;
    playSound(0);
}

void silentMoveTile(int x, int y) {
    gameBoard[emptyTileY][emptyTileX] = gameBoard[y][x];
    gameBoard[y][x] = 0;
    emptyTileX = x;
    emptyTileY = y;
}

void shuffleBoard() {
    iEnableButtons = 0;
    soundEnabled = false;
    
    randomSeed(analogRead(34));
    for (int i = 0; i < 200; i++) {
        int direction = random(4);
        int newX = emptyTileX;
        int newY = emptyTileY;
        
        switch (direction) {
            case 0: newY--; break;
            case 1: newY++; break;
            case 2: newX--; break;
            case 3: newX++; break;
        }
        
        if (newX >= 0 && newX < GRID_SIZE && newY >= 0 && newY < GRID_SIZE) {
            silentMoveTile(newX, newY);
        }
    }
    
    drawBoard();
    
    delay(250);
    soundEnabled = true;
    iEnableButtons = 1;
}

bool checkWin() {
    int value = 1;
    for (int y = 0; y < GRID_SIZE; y++) {
        for (int x = 0; x < GRID_SIZE; x++) {
            if (y == GRID_SIZE-1 && x == GRID_SIZE-1) {
                if (gameBoard[y][x] != 0) return false;
            } else {
                if (gameBoard[y][x] != value++) return false;
            }
        }
    }
    return true;
}

void gameWon() {
    tft.fillScreen(TFT_BLACK);
    drawFrame(10, TFT_GREEN);
    
    tft.setTextColor(TFT_YELLOW);
    tft.setTextSize(2);
    tft.setCursor(60, 60);
    tft.print("PUZZLE SOLVED!");
    
    tft.setTextSize(2);
    tft.setCursor(80, 120);
    tft.print("Moves: ");
    tft.print(moves);
    
    tft.setTextSize(1);
    tft.setCursor(85, 180);
    tft.print("Touch screen to continue");
    
    playSound(2);
    
    while(tft.getTouch(&pixel_x, &pixel_y)) {
        delay(10);
    }
    
    while(!tft.getTouch(&pixel_x, &pixel_y)) {
        delay(10);
    }
    
    gameStarted = false;
    moves = 0;
    showWelcomeScreen();
}

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