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No:48764

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Snake Game
Developer User20836｜Date and time 24/3/2 22:30:39
Build time 9.765 sec｜Game capacity 2.597KB｜

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<!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>

const snakeSize = 20;
    let snake = [{x: 200, y: 200}];
    let food = {x: 100, y: 100};
    let dx = 0;
    let dy = 0;

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

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

function moveSnake() {
      const head = {x: snake[0].x + dx, y: snake[0].y + dy};
      snake.unshift(head);

if (head.x === food.x && head.y === food.y) {
        generateFood();
      } else {
        snake.pop();
      }
    }

function generateFood() {
      const x = Math.floor(Math.random() * canvas.width / snakeSize) * snakeSize;
      const y = Math.floor(Math.random() * canvas.height / snakeSize) * snakeSize;
      food = {x, y};
    }

function checkCollision() {
      if (snake[0].x < 0 || snake[0].x >= canvas.width || snake[0].y < 0 || snake[0].y >= canvas.height) {
        return true;
      }

for (let i = 1; i < snake.length; i++) {
        if (snake[0].x === snake[i].x && snake[0].y === snake[i].y) {
          return true;
        }
      }

return false;
    }

function update() {
      ctx.clearRect(0, 0, canvas.width, canvas.height);

moveSnake();
      if (checkCollision()) {
        alert('Game Over! Your final score is ' + (snake.length - 1));
        snake = [{x: 200, y: 200}];
        dx = 0;
        dy = 0;
        generateFood();
      }

drawSnake();
      drawFood();

setTimeout(update, 100);
    }

generateFood();
    update();
  </script>
</body>
</html>