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Snake
Developer User19401｜Date and time 24/2/18 6:10:35
Build time 9.85 sec｜Game capacity 3.059KB｜

Script

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[PR]現在のフィギュア売れ筋ランキング

Click here for free DL of the app version that can save data.

<!DOCTYPE html>
<html>
<head>
    <title>Snake Game</title>
</head>
<body>
    <canvas id="gameCanvas" width="400" height="400"></canvas>
    <script>
        const canvas = document.getElementById('gameCanvas');
        const ctx = canvas.getContext('2d');
        
        let snake = [{ x: 200, y: 200 }];
        let apple = { x: 10, y: 10 };
        let direction = 'right';
        
        function drawSnake() {
            ctx.fillStyle = 'green';
            snake.forEach(segment => {
                ctx.fillRect(segment.x, segment.y, 10, 10);
            });
        }
        
        function drawApple() {
            ctx.fillStyle = 'red';
            ctx.fillRect(apple.x, apple.y, 10, 10);
        }
        
        function moveSnake() {
            const head = { x: snake[0].x, y: snake[0].y };
        
            switch (direction) {
                case 'up':
                    head.y -= 10;
                    break;
                case 'down':
                    head.y += 10;
                    break;
                case 'left':
                    head.x -= 10;
                    break;
                case 'right':
                    head.x += 10;
                    break;
            }
        
            snake.unshift(head);
        
            if (head.x === apple.x && head.y === apple.y) {
                generateApple();
            } else {
                snake.pop();
            }
        }
        
        function generateApple() {
            apple.x = Math.floor(Math.random() * canvas.width);
            apple.y = Math.floor(Math.random() * canvas.height);
        }
        
        function checkCollision() {
            if (snake[0].x < 0 || snake[0].x >= canvas.width || snake[0].y < 0 || snake[0].y >= canvas.height) {
                clearInterval(gameLoop);
                alert('Game Over!');
            }
        
            for (let i = 1; i < snake.length; i++) {
                if (snake[i].x === snake[0].x && snake[i].y === snake[0].y) {
                    clearInterval(gameLoop);
                    alert('Game Over!');
                }
            }
        }
        
        function gameLoop() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
        
            moveSnake();
            drawSnake();
            drawApple();
            checkCollision();
        }
        
        document.addEventListener('keydown', function(event) {
            switch (event.key) {
                case 'ArrowUp':
                    direction = 'up';
                    break;
                case 'ArrowDown':
                    direction = 'down';
                    break;
                case 'ArrowLeft':
                    direction = 'left';
                    break;
                case 'ArrowRight':
                    direction = 'right';
                    break;
            }
        });
        
        generateApple();
        const gameLoop = setInterval(() => {
            gameLoop();
        }, 100);
    </script>
</body>
</html>