帮我写个游戏代码无限升级升级变大。怎么用呢

以下是一个简单的游戏代码示例，可以无限升级，升级后变大：

import pygame
import random

# 初始化Pygame
pygame.init()

# 设置游戏窗口大小
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("升级变大游戏")

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

# 定义玩家初始位置和大小
player_x = screen_width // 2
player_y = screen_height // 2
player_size = 50

# 定义敌人初始位置和大小
enemy_x = random.randint(0, screen_width - player_size)
enemy_y = random.randint(0, screen_height - player_size)
enemy_size = 30

# 定义分数和等级
score = 0
level = 1

# 定义字体
font = pygame.font.SysFont(None, 30)

# 游戏循环
game_over = False
while not game_over:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True

    # 获取键盘输入
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT] and player_x > 0:
        player_x -= 5
    if keys[pygame.K_RIGHT] and player_x < screen_width - player_size:
        player_x += 5
    if keys[pygame.K_UP] and player_y > 0:
        player_y -= 5
    if keys[pygame.K_DOWN] and player_y < screen_height - player_size:
        player_y += 5

    # 绘制背景
    screen.fill(white)

    # 绘制玩家
    pygame.draw.rect(screen, black, [player_x, player_y, player_size, player_size])

    # 绘制敌人
    pygame.draw.rect(screen, red, [enemy_x, enemy_y, enemy_size, enemy_size])

    # 检测碰撞
    if player_x < enemy_x + enemy_size and player_x + player_size > enemy_x and player_y < enemy_y + enemy_size and player_y + player_size > enemy_y:
        score += 1
        player_size += 5
        enemy_x = random.randint(0, screen_width - player_size)
        enemy_y = random.randint(0, screen_height - player_size)
        if score % 10 == 0:
            level += 1

    # 绘制分数和等级
    score_text = font.render("分数: " + str(score), True, black)
    level_text = font.render("等级: " + str(level), True, black)
    screen.blit(score_text, [10, 10])
    screen.blit(level_text, [10, 30])

    # 更新屏幕
    pygame.display.update()

# 退出Pygame
pygame.quit()

使用方法：

将以上代码复制到Python编辑器中。
运行代码，游戏窗口将打开。
玩家使用方向键控制移动，吃掉敌人可以得分和升级。
游戏结束后，关闭游戏窗口即可退出游戏。