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```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Tetris Game</title>
<style>
body {
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
background: #1a1a1a;
font-family: Arial, sans-serif;
touch-action: none;
}
#gameContainer {
position: relative;
text-align: center;
background: #2d2d2d;
padding: 20px;
border-radius: 10px;
box-shadow: 0 0 20px rgba(0,0,0,0.5);
}
#startButton {
margin: 20px auto;
padding: 12px 30px;
font-size: 1.2em;
background: #4CAF50;
border: none;
border-radius: 5px;
cursor: pointer;
transition: 0.3s;
display: block;
}
#controls {
position: absolute;
width: 100%;
bottom: -80px;
display: none;
justify-content: space-around;
}
#controls button {
padding: 15px 30px;
font-size: 1.5em;
background: #007bff;
border: none;
border-radius: 5px;
color: white;
cursor: pointer;
transition: 0.3s;
}
#controls button:hover {
background: #0056b3;
}
canvas {
border: 2px solid #4a4a4a;
background: #000;
display: none;
}
#scoreBoard {
margin-top: 15px;
color: white;
font-size: 1.2em;
display: none;
}
#gameOver {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: rgba(0,0,0,0.8);
padding: 20px;
border-radius: 10px;
color: white;
font-size: 2em;
display: none;
text-align: center;
}
#restartButton {
margin-top: 20px;
padding: 10px 20px;
background: #4CAF50;
border: none;
border-radius: 5px;
color: white;
cursor: pointer;
}
</style>
</head>
<body>
<div id="gameContainer">
<button id="startButton">Start Game</button>
<canvas id="tetrisCanvas"></canvas>
<div id="scoreBoard">
Score: <span id="score">0</span><br>
Level: <span id="level">1</span>
</div>
<div id="controls">
<button id="leftButton">←</button>
<button id="rotateButton">↻</button>
<button id="rightButton">→</button>
</div>
<div id="gameOver" style="display: none;">
Game Over<br>
Your score: <span id="finalScore"></span><br>
<button id="restartButton">Restart</button>
</div>
</div>
<script>
const canvas = document.getElementById('tetrisCanvas');
const context = canvas.getContext('2d');
const startButton = document.getElementById('startButton');
canvas.width = 300;
canvas.height = 600;
const blockSize = 30;
const boardWidth = canvas.width / blockSize;
const boardHeight = canvas.height / blockSize;
const colors = ['#00FFFF', '#FFFF00', '#87CEEB', '#FF00FF', '#FFA500', '#FFD700', '#1E90FF'];
const pieces = [
[[1,1,1,1]], // I
[[1,1],[1,1]], // O
[[0,1,0],[1,1,1]], // T
[[1,0,0],[1,1,1]], // L
[[0,0,1],[1,1,1]], // J
[[0,1,1],[1,1,0]], // S
[[1,1,0],[0,1,1]] // Z
];
let board = Array.from({length: boardHeight}, () => Array(boardWidth).fill(0));
let currentPiece = { shape: [], x: 0, y: 0 };
let score = 0;
let level = 1;
let dropSpeed = 600;
let lastTime = 0;
let gameStarted = false;
let gameOver = false;
let touchStartX = 0;
let touchStartY = 0;
let linesToClear = [];
let clearAnimationTime = 0;
const ANIMATION_DURATION = 500;
function drawBlock(x, y, color) {
context.fillStyle = color;
context.fillRect(x * blockSize, y * blockSize, blockSize, blockSize);
context.strokeStyle = '#000';
context.strokeRect(x * blockSize, y * blockSize, blockSize, blockSize);
}
function drawBoard() {
context.clearRect(0, 0, canvas.width, canvas.height);
for (let y = 0; y < boardHeight; y++) {
for (let x = 0; x < boardWidth; x++) {
if (board[y][x]) {
const cellValue = board[y][x];
if (linesToClear.includes(y)) {
const elapsed = Date.now() - clearAnimationTime;
const progress = Math.min(elapsed / ANIMATION_DURATION, 1);
context.globalAlpha = 1 - progress;
}
drawBlock(x, y, colors[cellValue-1]);
context.globalAlpha = 1;
}
}
}
}
function drawPiece() {
currentPiece.shape.forEach((row, dy) => {
row.forEach((value, dx) => {
if (value) {
drawBlock(currentPiece.x + dx, currentPiece.y + dy, colors[value-1]);
}
});
});
}
function collide() {
for (let y = 0; y < currentPiece.shape.length; y++) {
for (let x = 0; x < currentPiece.shape[y].length; x++) {
if (currentPiece.shape[y][x]) {
const newX = currentPiece.x + x;
const newY = currentPiece.y + y;
if (newY < 0 || newX < 0 || newX >= boardWidth || newY >= boardHeight) {
return true;
}
if (board[newY][newX] !== 0) {
return true;
}
}
}
}
return false;
}
function merge() {
currentPiece.shape.forEach((row, dy) => {
row.forEach((value, dx) => {
if (value) {
board[currentPiece.y + dy][currentPiece.x + dx] = value;
}
});
});
}
function rotate(matrix) {
const rows = matrix.length;
const cols = matrix[0].length;
const rotated = Array.from({ length: cols }, () => Array(rows).fill(0));
for (let i = 0; i < rows; i++) {
for (let j = 0; j < cols; j++) {
rotated[j][rows - i - 1] = matrix[i][j];
}
}
return rotated;
}
function newPiece() {
const random = Math.floor(Math.random() * pieces.length);
currentPiece.shape = pieces[random].map(row =>
row.map(cell => cell ? (random + 1) : 0)
);
currentPiece.x = Math.floor((boardWidth - currentPiece.shape[0].length) / 2);
currentPiece.y = 0;
if (collide()) {
document.getElementById('gameOver').style.display = 'block';
document.getElementById('finalScore').innerText = score;
gameStarted = false;
gameOver = true;
return;
}
drawBoard();
drawPiece();
}
function drop() {
currentPiece.y++;
if (collide()) {
currentPiece.y--;
merge();
clearLines();
newPiece();
}
drawBoard();
drawPiece();
}
function dropInstant() {
while (currentPiece.y < boardHeight - currentPiece.shape.length) {
currentPiece.y++;
if (collide()) {
currentPiece.y--;
break;
}
}
merge();
clearLines();
newPiece();
}
function clearLines() {
let linesCleared = 0;
linesToClear = [];
for (let y = boardHeight - 1; y >= 0; y--) {
if (board[y].every(cell => cell !== 0)) {
linesToClear.push(y);
linesCleared++;
}
}
if (linesCleared > 0) {
score += linesCleared * (100 * level);
document.getElementById('score').innerText = score;
updateLevel();
clearAnimationTime = Date.now();
setTimeout(() => {
for (let i = linesCleared - 1; i >= 0; i--) {
board.splice(linesToClear[i], 1);
}
for (let i = 0; i < linesCleared; i++) {
board.unshift(Array(boardWidth).fill(0));
}
linesToClear = [];
drawBoard();
newPiece();
}, ANIMATION_DURATION);
}
}
function updateLevel() {
level = Math.floor(score / 1000) + 1;
document.getElementById('level').innerText = level;
dropSpeed = 1000 - (level - 1) * 50;
if (dropSpeed < 300) dropSpeed = 300;
}
function move(direction) {
if (!gameStarted || gameOver) return;
const originalX = currentPiece.x;
currentPiece.x += direction;
if (collide()) currentPiece.x = originalX;
}
function rotatePiece() {
if (!gameStarted || gameOver) return;
const originalShape = currentPiece.shape;
currentPiece.shape = rotate(currentPiece.shape);
if (collide()) currentPiece.shape = originalShape;
}
document.addEventListener('keydown', event => {
if (event.keyCode === 37) move(-1);
if (event.keyCode === 39) move(1);
if (event.keyCode === 40) drop();
if (event.keyCode === 32) dropInstant();
if (event.keyCode === 38) rotatePiece();
});
canvas.addEventListener('touchstart', (e) => {
if (!gameStarted || gameOver) return;
const rect = canvas.getBoundingClientRect();
touchStartX = e.touches[0].clientX - rect.left;
touchStartY = e.touches[0].clientY - rect.top;
});
canvas.addEventListener('touchend', (e) => {
if (!gameStarted || gameOver) return;
const rect = canvas.getBoundingClientRect();
const touchEndX = e.changedTouches[0].clientX - rect.left;
const touchEndY = e.changedTouches[0].clientY - rect.top;
const deltaX = touchEndX - touchStartX;
const deltaY = touchEndY - touchStartY;
if (Math.abs(deltaX) > Math.abs(deltaY)) {
if (deltaX > 50) move(1);
else if (deltaX < -50) move(-1);
} else {
if (deltaY < -50) rotatePiece();
else if (deltaY > 50) dropInstant();
}
});
function update(time = 0) {
if (!gameStarted || gameOver) return;
const deltaTime = time - lastTime;
if (deltaTime > dropSpeed) {
drop();
lastTime = time;
}
requestAnimationFrame(update);
}
function startGame() {
if (gameStarted) return;
gameStarted = true;
gameOver = false;
document.getElementById('gameOver').style.display = 'none';
canvas.style.display = 'block';
document.getElementById('scoreBoard').style.display = 'block';
document.getElementById('controls').style.display = 'flex';
startButton.style.display = 'none';
board = Array.from({length: boardHeight}, () => Array(boardWidth).fill(0));
score = 0;
level = 1;
document.getElementById('score').innerText = score;
document.getElementById('level').innerText = level;
newPiece();
requestAnimationFrame(update);
}
function restartGame() {
document.getElementById('gameOver').style.display = 'none';
startGame();
}
startButton.addEventListener('click', startGame);
document.getElementById('leftButton').addEventListener('click', () => move(-1));
document.getElementById('rightButton').addEventListener('click', () => move(1));
document.getElementById('rotateButton').addEventListener('click', rotatePiece);
document.getElementById('restartButton').addEventListener('click', restartGame);
</script>
</body>
</html>
```