利用pygame模块实现飞机大战附加功能如下： （1） 实现碰撞检测（可以消灭敌机，也可以被敌机消灭） （2） 随机出现云朵在天空中漂浮 （3） 随机出现甜甜圈进行能量补给（生命力或子弹类型发生变化） （4） 有GAME OVER条件控制处理

好的，下面是代码实现：

import pygame
import random

# 初始化pygame模块
pygame.init()

# 定义窗口尺寸和标题
screen_width, screen_height = 480, 700
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("飞机大战")

# 加载图片资源
background_img = pygame.image.load("images/background.png")
player_img = pygame.image.load("images/player.png")
enemy_img = pygame.image.load("images/enemy.png")
cloud_img = pygame.image.load("images/cloud.png")
bullet_img = pygame.image.load("images/bullet.png")
supply_img = pygame.image.load("images/supply.png")

# 设置字体
font = pygame.font.Font(None, 36)

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

# 定义玩家类
class Player(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = player_img
        self.rect = self.image.get_rect()
        self.rect.centerx = screen_width // 2
        self.rect.bottom = screen_height - 10
        self.speed = 5
        self.bullets = pygame.sprite.Group()
        self.life = 3

    def update(self, *args):
        # 移动玩家
        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 < screen_width:
            self.rect.x += self.speed
        if keys[pygame.K_UP] and self.rect.top > 0:
            self.rect.y -= self.speed
        if keys[pygame.K_DOWN] and self.rect.bottom < screen_height:
            self.rect.y += self.speed

        # 发射子弹
        if args and args[0].type == pygame.KEYDOWN and args[0].key == pygame.K_SPACE:
            bullet = Bullet(self.rect.centerx, self.rect.top)
            self.bullets.add(bullet)

    def draw(self, surface):
        # 绘制玩家生命值
        life_text = font.render(f"Life: {self.life}", True, white)
        surface.blit(life_text, (10, 10))

        # 绘制玩家
        surface.blit(self.image, self.rect)

# 定义子弹类
class Bullet(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.image = bullet_img
        self.rect = self.image.get_rect()
        self.rect.centerx = x
        self.rect.bottom = y
        self.speed = -10

    def update(self, *args):
        # 移动子弹
        self.rect.y += self.speed

        # 销毁超出屏幕的子弹
        if self.rect.bottom < 0:
            self.kill()

    def draw(self, surface):
        # 绘制子弹
        surface.blit(self.image, self.rect)

# 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.centerx = random.randint(0, screen_width)
        self.rect.top = random.randint(-100, -50)
        self.speed = random.randint(1, 5)

    def update(self, *args):
        # 移动敌机
        self.rect.y += self.speed

        # 销毁超出屏幕的敌机
        if self.rect.top > screen_height:
            self.kill()

    def draw(self, surface):
        # 绘制敌机
        surface.blit(self.image, self.rect)

# 定义云朵类
class Cloud(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = cloud_img
        self.rect = self.image.get_rect()
        self.rect.centerx = random.randint(0, screen_width)
        self.rect.centery = random.randint(0, screen_height // 3)

    def update(self, *args):
        pass

    def draw(self, surface):
        # 绘制云朵
        surface.blit(self.image, self.rect)

# 定义能量补给类
class Supply(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = supply_img
        self.rect = self.image.get_rect()
        self.rect.centerx = random.randint(0, screen_width)
        self.rect.top = random.randint(-100, -50)
        self.speed = 3

    def update(self, *args):
        # 移动能量补给
        self.rect.y += self.speed

        # 销毁超出屏幕的能量补给
        if self.rect.top > screen_height:
            self.kill()

    def draw(self, surface):
        # 绘制能量补给
        surface.blit(self.image, self.rect)

# 定义游戏结束函数
def game_over(surface):
    # 绘制游戏结束文本
    game_over_text = font.render("Game Over", True, red)
    surface.blit(game_over_text, (screen_width // 2 - 80, screen_height // 2 - 50))

    # 绘制得分文本
    score_text = font.render(f"Score: {score}", True, white)
    surface.blit(score_text, (screen_width // 2 - 60, screen_height // 2))

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

# 创建玩家对象
player = Player()

# 添加对象到精灵组
all_sprites.add(player)

# 设置游戏循环
running = True
score = 0
game_over_flag = False
while running:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        else:
            player.update(event)

    # 随机添加敌机
    if random.randint(1, 100) == 1 and not game_over_flag:
        enemy = Enemy()
        all_sprites.add(enemy)
        enemies.add(enemy)

    # 随机添加云朵
    if random.randint(1, 1000) == 1 and not game_over_flag:
        cloud = Cloud()
        all_sprites.add(cloud)
        clouds.add(cloud)

    # 随机添加能量补给
    if random.randint(1, 2000) == 1 and not game_over_flag:
        supply = Supply()
        all_sprites.add(supply)
        supplies.add(supply)

    # 更新精灵组
    all_sprites.update()

    # 绘制背景
    screen.blit(background_img, (0, 0))

    # 绘制精灵组
    for sprite in all_sprites:
        sprite.draw(screen)

    # 碰撞检测
    for bullet in player.bullets:
        enemies_hit = pygame.sprite.spritecollide(bullet, enemies, True)
        for enemy in enemies_hit:
            score += 10
            bullet.kill()

    enemies_hit = pygame.sprite.spritecollide(player, enemies, True)
    for enemy in enemies_hit:
        player.life -= 1
        if player.life <= 0:
            game_over_flag = True

    supplies_hit = pygame.sprite.spritecollide(player, supplies, True)
    for supply in supplies_hit:
        player.life += 1
        if player.life > 5:
            player.life = 5

    # 绘制得分
    score_text = font.render(f"Score: {score}", True, white)
    screen.blit(score_text, (10, screen_height - 50))

    # 判断游戏是否结束
    if game_over_flag:
        game_over(screen)
        pygame.display.update()
        pygame.time.delay(2000)
        running = False

    # 更新屏幕
    pygame.display.update()

# 退出游戏
pygame.quit()

注：以上代码中的图片资源可以自己准备，也可以在网上搜索下载。