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tetris-game (1).html
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<!DOCTYPE html>
<html>
<head>
<title>Simple Tetris</title>
<style>
body {
display: flex;
flex-direction: column;
align-items: center;
background-color: #f0f0f0;
font-family: Arial, sans-serif;
}
canvas {
border: 2px solid #333;
background-color: #000;
}
.game-info {
margin: 20px;
font-size: 24px;
}
</style>
</head>
<body>
<div class="game-info">Score: <span id="score">0</span></div>
<canvas id="gameCanvas" width="300" height="600"></canvas>
<script>
const canvas = document.getElementById('gameCanvas');
const ctx = canvas.getContext('2d');
const scoreElement = document.getElementById('score');
const BLOCK_SIZE = 30;
const BOARD_WIDTH = 10;
const BOARD_HEIGHT = 20;
let score = 0;
// Initialize the game board
let board = Array(BOARD_HEIGHT).fill().map(() => Array(BOARD_WIDTH).fill(0));
// Tetromino shapes
const SHAPES = [
[[1, 1, 1, 1]], // I
[[1, 1], [1, 1]], // O
[[1, 1, 1], [0, 1, 0]], // T
[[1, 1, 1], [1, 0, 0]], // L
[[1, 1, 1], [0, 0, 1]], // J
[[1, 1, 0], [0, 1, 1]], // S
[[0, 1, 1], [1, 1, 0]] // Z
];
const COLORS = [
'#00f0f0', // cyan
'#f0f000', // yellow
'#a000f0', // purple
'#f0a000', // orange
'#0000f0', // blue
'#00f000', // green
'#f00000' // red
];
let currentPiece = null;
let currentPieceX = 0;
let currentPieceY = 0;
let currentPieceType = 0;
class Piece {
constructor(shape, color) {
this.shape = shape;
this.color = color;
}
}
function createNewPiece() {
const typeIndex = Math.floor(Math.random() * SHAPES.length);
currentPieceType = typeIndex;
currentPiece = new Piece(SHAPES[typeIndex], COLORS[typeIndex]);
currentPieceX = Math.floor((BOARD_WIDTH - currentPiece.shape[0].length) / 2);
currentPieceY = 0;
}
function drawBlock(x, y, color) {
ctx.fillStyle = color;
ctx.fillRect(x * BLOCK_SIZE, y * BLOCK_SIZE, BLOCK_SIZE - 1, BLOCK_SIZE - 1);
}
function drawBoard() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
// Draw placed pieces
for (let y = 0; y < BOARD_HEIGHT; y++) {
for (let x = 0; x < BOARD_WIDTH; x++) {
if (board[y][x]) {
drawBlock(x, y, COLORS[board[y][x] - 1]);
}
}
}
// Draw current piece
if (currentPiece) {
for (let y = 0; y < currentPiece.shape.length; y++) {
for (let x = 0; x < currentPiece.shape[y].length; x++) {
if (currentPiece.shape[y][x]) {
drawBlock(currentPieceX + x, currentPieceY + y, currentPiece.color);
}
}
}
}
}
function collision(pieceX, pieceY, piece) {
for (let y = 0; y < piece.shape.length; y++) {
for (let x = 0; x < piece.shape[y].length; x++) {
if (piece.shape[y][x]) {
if (pieceY + y >= BOARD_HEIGHT ||
pieceX + x < 0 ||
pieceX + x >= BOARD_WIDTH ||
(pieceY + y >= 0 && board[pieceY + y][pieceX + x])) {
return true;
}
}
}
}
return false;
}
function mergePiece() {
for (let y = 0; y < currentPiece.shape.length; y++) {
for (let x = 0; x < currentPiece.shape[y].length; x++) {
if (currentPiece.shape[y][x]) {
if (currentPieceY + y >= 0) {
board[currentPieceY + y][currentPieceX + x] = currentPieceType + 1;
}
}
}
}
}
function clearLines() {
let linesCleared = 0;
for (let y = BOARD_HEIGHT - 1; y >= 0; y--) {
if (board[y].every(cell => cell !== 0)) {
board.splice(y, 1);
board.unshift(Array(BOARD_WIDTH).fill(0));
linesCleared++;
y++;
}
}
if (linesCleared > 0) {
score += [40, 100, 300, 1200][linesCleared - 1];
scoreElement.textContent = score;
}
}
function rotatePiece() {
const newShape = currentPiece.shape[0].map((_, i) =>
currentPiece.shape.map(row => row[i]).reverse()
);
const oldShape = currentPiece.shape;
currentPiece.shape = newShape;
if (collision(currentPieceX, currentPieceY, currentPiece)) {
currentPiece.shape = oldShape;
}
}
function gameOver() {
alert('Game Over! Score: ' + score);
board = Array(BOARD_HEIGHT).fill().map(() => Array(BOARD_WIDTH).fill(0));
score = 0;
scoreElement.textContent = '0';
createNewPiece();
}
function dropPiece() {
currentPieceY++;
if (collision(currentPieceX, currentPieceY, currentPiece)) {
currentPieceY--;
mergePiece();
clearLines();
createNewPiece();
if (collision(currentPieceX, currentPieceY, currentPiece)) {
gameOver();
}
}
drawBoard();
}
// Keyboard controls
document.addEventListener('keydown', (e) => {
switch(e.key) {
case 'ArrowLeft':
if (!collision(currentPieceX - 1, currentPieceY, currentPiece)) {
currentPieceX--;
}
break;
case 'ArrowRight':
if (!collision(currentPieceX + 1, currentPieceY, currentPiece)) {
currentPieceX++;
}
break;
case 'ArrowDown':
dropPiece();
break;
case 'ArrowUp':
rotatePiece();
break;
case ' ':
while (!collision(currentPieceX, currentPieceY + 1, currentPiece)) {
currentPieceY++;
}
dropPiece();
break;
}
drawBoard();
});
// Game loop
createNewPiece();
setInterval(dropPiece, 1000);
drawBoard();
</script>
</body>
</html>