a classic, snake game

Here's the code if you want it, scroll down to have a play. p5.js.org and ChatGPT walked me through this one.

highScore) {
        highScore = points;
      }
      gameOver = true;
    }
  }
  
  display() {
    fill(255, 255, 0);
    for (let i = 0; i < this.body.length; i++) {
      rect(this.body[i].x, this.body[i].y, gridSize, gridSize);
    }
  }
  
  dir(x, y) {
    this.xspeed = x;
    this.yspeed = y;
  }
  
  eat(pos) {
    let head = this.body[this.body.length - 1];
    if (head.x === pos.x && head.y === pos.y) {
      return true;
    }
    return false;
  }
  
  collide() {
    let head = this.body[this.body.length - 1];
    for (let i = 0; i < this.body.length - 1; i++) {
      if (head.x === this.body[i].x && head.y === this.body[i].y) {
        return true;
      }
    }
    if (head.x >= width || head.x < 0 || head.y >= height || head.y < 0) {
      return true;
    }
    return false;
  }
  
  reset() {
    this.body = [];
    this.body[0] = createVector(floor(cols / 2) * gridSize, floor(rows / 2) * gridSize);
    this.xspeed = 1;
    this.yspeed = 0;
  }
  
  grow() {
    let tail = this.body[this.body.length - 1].copy();
    this.body.push(tail);
  }
}">