Pygame无法创建一个功能，可以让蛇吃食物，也可以关闭游戏，还可以增加蛇的大小

import pygame
import random

# 初始化Pygame
pygame.init()

# 设置窗口大小和标题
window_width = 800
window_height = 600
window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption("Snake Game")

# 定义颜色
white = (255, 255, 255)
red = (255, 0, 0)
green = (0, 255, 0)

# 定义蛇的初始位置和大小
snake_size = 20
snake_x = window_width // 2
snake_y = window_height // 2
snake_speed = 5

# 定义食物的初始位置
food_x = random.randint(0, window_width - snake_size)
food_y = random.randint(0, window_height - snake_size)

# 定义蛇的移动方向
snake_direction = "RIGHT"

# 游戏主循环
running = True
while running:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP and snake_direction != "DOWN":
                snake_direction = "UP"
            elif event.key == pygame.K_DOWN and snake_direction != "UP":
                snake_direction = "DOWN"
            elif event.key == pygame.K_LEFT and snake_direction != "RIGHT":
                snake_direction = "LEFT"
            elif event.key == pygame.K_RIGHT and snake_direction != "LEFT":
                snake_direction = "RIGHT"

    # 更新蛇的位置
    if snake_direction == "UP":
        snake_y -= snake_speed
    elif snake_direction == "DOWN":
        snake_y += snake_speed
    elif snake_direction == "LEFT":
        snake_x -= snake_speed
    elif snake_direction == "RIGHT":
        snake_x += snake_speed

    # 绘制背景
    window.fill(white)

    # 绘制蛇
    pygame.draw.rect(window, green, (snake_x, snake_y, snake_size, snake_size))

    # 绘制食物
    pygame.draw.rect(window, red, (food_x, food_y, snake_size, snake_size))

    # 碰撞检测
    if snake_x == food_x and snake_y == food_y:
        # 蛇吃到了食物，增加蛇的长度
        # 在随机位置生成新的食物
        food_x = random.randint(0, window_width - snake_size)
        food_y = random.randint(0, window_height - snake_size)

    # 更新显示
    pygame.display.update()

# 关闭游戏窗口
pygame.quit()