Code snake but instead of me playing as a snake the snakes try to mine in front of each other the snakes start with length 3 but if a snake hits the side of another snake it dies and the snake it hit grows Also I don't play I only watch's game

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Code snake but instead of me playing as a snake th..ALL
Developer User20679｜Date and time 24/3/1 7:32:09
Build time 9.675 sec｜Game capacity 2.361KB｜

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[PR]現在の売れ筋アプリランキング

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<!DOCTYPE html>
<html>
<head>
<title>Mining Snake Game</title>
<style>
  #game-board {
    width: 400px;
    height: 400px;
    border: 1px solid black;
  }
</style>
</head>
<body>
<div id="game-board"></div>

let snakes = [
    { x: 5, y: 5, direction: "right", length: 3 },
    { x: 15, y: 15, direction: "left", length: 3 }
  ];
  let food = { x: getRandomNumber(), y: getRandomNumber() };

function getRandomNumber() {
    return Math.floor(Math.random() * (board.width / size));
  }

function drawSnake(x, y) {
    ctx.fillStyle = snakeColor;
    ctx.fillRect(x * size, y * size, size, size);
  }

function drawFood(x, y) {
    ctx.fillStyle = foodColor;
    ctx.fillRect(x * size, y * size, size, size);
  }

function updateSnake(snake) {
    let newX = snake.x;
    let newY = snake.y;

switch(snake.direction) {
      case "up":
        newY--;
        break;
      case "down":
        newY++;
        break;
      case "left":
        newX--;
        break;
      case "right":
        newX++;
        break;
    }

if (newX < 0 || newX >= board.width / size || newY < 0 || newY >= board.height / size) {
      // Snake hit the wall, it dies
      for (let i = 0; i < snakes.length; i++) {
        if (snakes[i] === snake) {
          snakes.splice(i, 1);
          return;
        }
      }
    }

snake.x = newX;
    snake.y = newY;

for (let i = 0; i < snakes.length; i++) {
      if (snakes[i] !== snake && snakes[i].x === snake.x && snakes[i].y === snake.y) {
        // Snake ran into another snake, it grows
        snake.length++;
        snakes.splice(i, 1);
        return;
      }
    }

if (newX === food.x && newY === food.y) {
      snake.length++;
      food.x = getRandomNumber();
      food.y = getRandomNumber();
    }

drawSnake(newX, newY);

if (snake.length > 1) {
      updateSnake({ x: snake.x, y: snake.y, direction: snake.direction, length: snake.length - 1 });
    }
  }

function updateGame() {
    ctx.clearRect(0, 0, board.width, board.height);

for (let snake of snakes) {
      updateSnake(snake);
    }

drawFood(food.x, food.y);
  }

setInterval(updateGame, 100);
</script>
</body>
</html>