编写一个简单的pygame小游戏

好的，这里是一个简单的Python Pygame小游戏示例，名为“飞机大战”：

import pygame
import random

# 初始化Pygame
pygame.init()

# 窗口尺寸
WINDOW_WIDTH = 480
WINDOW_HEIGHT = 800

# 颜色定义
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)

# 创建游戏窗口
game_window = pygame.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT))

# 设置游戏窗口标题
pygame.display.set_caption('飞机大战')

# 加载背景音乐
pygame.mixer.music.load('bgm.mp3')
pygame.mixer.music.play(-1)

# 加载图片
background_img = pygame.image.load('background.png')
player_img = pygame.image.load('player.png')
enemy_img = pygame.image.load('enemy.png')

# 设置字体
font = pygame.font.SysFont(None, 48)

# 定义玩家飞机类
class Player(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = player_img
        self.rect = self.image.get_rect()
        self.rect.centerx = WINDOW_WIDTH // 2
        self.rect.bottom = WINDOW_HEIGHT - 10
        self.speed = 5

    def update(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT] and self.rect.left > 0:
            self.rect.x -= self.speed
        if keys[pygame.K_RIGHT] and self.rect.right < WINDOW_WIDTH:
            self.rect.x += self.speed

# 定义敌机类
class Enemy(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = enemy_img
        self.rect = self.image.get_rect()
        self.rect.x = random.randrange(WINDOW_WIDTH - self.rect.width)
        self.rect.y = random.randrange(-100, -40)
        self.speed = random.randrange(1, 5)

    def update(self):
        self.rect.y += self.speed
        if self.rect.top > WINDOW_HEIGHT:
            self.rect.x = random.randrange(WINDOW_WIDTH - self.rect.width)
            self.rect.y = random.randrange(-100, -40)
            self.speed = random.randrange(1, 5)

# 创建精灵组
all_sprites = pygame.sprite.Group()
enemies = pygame.sprite.Group()

# 创建玩家飞机
player = Player()
all_sprites.add(player)

# 创建敌机
for i in range(10):
    enemy = Enemy()
    all_sprites.add(enemy)
    enemies.add(enemy)

# 游戏主循环
clock = pygame.time.Clock()
score = 0

running = True
while running:
    clock.tick(60)

    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 更新精灵组
    all_sprites.update()

    # 碰撞检测
    hits = pygame.sprite.spritecollide(player, enemies, False)
    if hits:
        running = False

    # 绘制屏幕
    game_window.fill(BLACK)
    game_window.blit(background_img, (0, 0))
    all_sprites.draw(game_window)

    # 绘制分数
    score_text = font.render(f'Score: {score}', True, WHITE)
    game_window.blit(score_text, (10, 10))

    # 更新屏幕
    pygame.display.update()

# 退出Pygame
pygame.quit()

这个游戏的玩法很简单，玩家控制一个飞机躲避敌机并尽可能地存活下去，每撞毁一架敌机得一分。