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Snake
Developer User19469｜Date and time 24/2/19 5:35:55
Build time 9.331 sec｜Game capacity 2.678KB｜

Script

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

<!DOCTYPE html>
<html>
<head>
    <title>Snake Game</title>
    <style>
        canvas {
            border: 1px solid black;
        }
    </style>
</head>
<body>
<canvas id="gameCanvas" width="400" height="400"></canvas>
<script>
    const canvas = document.getElementById('gameCanvas');
    const ctx = canvas.getContext('2d');
    const box = 20;
    const snake = [{ x: 10, y: 10 }];
    let score = 0;
    let food = { x: Math.floor(Math.random() * 20) * box, y: Math.floor(Math.random() * 20) * box };
    let direction = 'right';

document.addEventListener('keydown', changeDirection);

function drawSnake() {
        snake.forEach(segment => {
            ctx.fillStyle = 'green';
            ctx.fillRect(segment.x, segment.y, box, box);
        });
    }

function drawFood() {
        ctx.fillStyle = 'red';
        ctx.fillRect(food.x, food.y, box, box);
    }

function moveSnake() {
        const head = { x: snake[0].x, y: snake[0].y };
        if (direction === 'up') head.y -= box;
        if (direction === 'down') head.y += box;
        if (direction === 'left') head.x -= box;
        if (direction === 'right') head.x += box;

if (head.x === food.x && head.y === food.y) {
            score++;
            food = { x: Math.floor(Math.random() * 20) * box, y: Math.floor(Math.random() * 20) * box };
        } else {
            snake.pop();
        }

snake.unshift(head);
    }

function checkCollision() {
        if (snake[0].x < 0 || snake[0].x >= canvas.width || snake[0].y < 0 || snake[0].y >= canvas.height) {
            clearInterval(game);
            alert('Game Over! Your score: ' + score);
        }

for (let i = 1; i < snake.length; i++) {
            if (snake[0].x === snake[i].x && snake[0].y === snake[i].y) {
                clearInterval(game);
                alert('Game Over! Your score: ' + score);
            }
        }
    }

function draw() {
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        drawSnake();
        drawFood();
        moveSnake();
        checkCollision();
    }

let game = setInterval(draw, 100);
</script>
</body>
</html>