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Snake Game
Developer User22126｜Date and time 24/3/24 14:05:47
Build time 12.548 sec｜Game capacity 3.219KB｜

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<!DOCTYPE html>
<html>
<head>
    <title>Snake Game</title>
    <style>
        canvas {
            background-color: black;
            display: block;
            margin: 0 auto;
        }
    </style>
</head>
<body>
    <canvas id="gameCanvas" width="400" height="400"></canvas>
    <script>
        const canvas = document.getElementById('gameCanvas');
        const ctx = canvas.getContext('2d');
        
        const TILE_SIZE = 20;
        let snake = [{x: 10, y: 10}];
        let direction = 'right';
        let food = {x: 15, y: 15};
        let score = 0;
        
        function drawTile(tile, color) {
            ctx.fillStyle = color;
            ctx.fillRect(tile.x * TILE_SIZE, tile.y * TILE_SIZE, TILE_SIZE, TILE_SIZE);
        }
        
        function drawSnake() {
            snake.forEach(segment => {
                drawTile(segment, 'green');
            });
        }
        
        function drawFood() {
            drawTile(food, 'red');
        }
        
        function moveSnake() {
            const head = {...snake[0]};
            if (direction === 'right') head.x++;
            if (direction === 'left') head.x--;
            if (direction === 'up') head.y--;
            if (direction === 'down') head.y++;
        
            snake.unshift(head);
        
            if (head.x === food.x && head.y === food.y) {
                score++;
                createFood();
            } else {
                snake.pop();
            }
        }
        
        function createFood() {
            food.x = Math.floor(Math.random() * Math.floor(canvas.width / TILE_SIZE));
            food.y = Math.floor(Math.random() * Math.floor(canvas.height / TILE_SIZE));
        }
        
        function checkCollision() {
            const head = snake[0];
            if (head.x < 0 || head.x >= canvas.width / TILE_SIZE || head.y < 0 || head.y >= canvas.height / TILE_SIZE) {
                gameOver();
            }
        
            for (let i = 1; i < snake.length; i++) {
                if (head.x === snake[i].x && head.y === snake[i].y) {
                    gameOver();
                }
            }
        }
        
        function gameOver() {
            alert('Game Over! Your score: ' + score);
            snake = [{x: 10, y: 10}];
            direction = 'right';
            score = 0;
            createFood();
        }
        
        function updateGame() {
            setTimeout(() => {
                ctx.clearRect(0, 0, canvas.width, canvas.height);
                moveSnake();
                checkCollision();
                drawSnake();
                drawFood();
                updateGame();
            }, 100);
        }
        
        document.addEventListener('keydown', (event) => {
            if (event.key === 'ArrowUp' && direction !== 'down') direction = 'up';
            if (event.key === 'ArrowDown' && direction !== 'up') direction = 'down';
            if (event.key === 'ArrowLeft' && direction !== 'right') direction = 'left';
            if (event.key === 'ArrowRight' && direction !== 'left') direction = 'right';
        });
        
        createFood();
        updateGame();
    </script>
</body>
</html>