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，下面是一个基于Pygame的飞机大战游戏，实现了上述附加功能：

import pygame
import random

# 初始化Pygame
pygame.init()

# 游戏窗口大小
WIDTH = 480
HEIGHT = 600

# 定义颜色
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)

# 游戏窗口
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Plane War")

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

# 加载游戏音效
bullet_sound = pygame.mixer.Sound("bullet.wav")
explosion_sound = pygame.mixer.Sound("explosion.wav")

# 加载图像
bg_image = pygame.image.load("background.png")
player_image = pygame.image.load("player.png")
enemy_image = pygame.image.load("enemy.png")
cloud_image = pygame.image.load("cloud.png")
donut_image = pygame.image.load("donut.png")


# 定义游戏对象类
class GameObject(pygame.sprite.Sprite):
    def __init__(self, x, y, image):
        super().__init__()
        self.image = image
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y


# 定义玩家类
class Player(GameObject):
    def __init__(self, x, y, image):
        super().__init__(x, y, image)
        self.speed = 5
        self.lives = 3
        self.bullets = pygame.sprite.Group()

    def update(self, keys):
        # 移动玩家
        if keys[pygame.K_LEFT] and self.rect.x > 0:
            self.rect.x -= self.speed
        if keys[pygame.K_RIGHT] and self.rect.x < WIDTH - self.rect.width:
            self.rect.x += self.speed
        if keys[pygame.K_UP] and self.rect.y > 0:
            self.rect.y -= self.speed
        if keys[pygame.K_DOWN] and self.rect.y < HEIGHT - self.rect.height:
            self.rect.y += self.speed

        # 发射子弹
        if keys[pygame.K_SPACE]:
            self.shoot()

    def shoot(self):
        bullet = Bullet(self.rect.centerx, self.rect.y)
        self.bullets.add(bullet)
        bullet_sound.play()


# 定义子弹类
class Bullet(GameObject):
    def __init__(self, x, y):
        super().__init__(x, y, pygame.Surface((3, 10)))
        self.image.fill(RED)
        self.speed = 10

    def update(self):
        self.rect.y -= self.speed


# 定义敌机类
class Enemy(GameObject):
    def __init__(self, x, y, image):
        super().__init__(x, y, image)
        self.speed = random.randint(2, 6)

    def update(self):
        self.rect.y += self.speed


# 定义云朵类
class Cloud(GameObject):
    def __init__(self, x, y, image):
        super().__init__(x, y, image)
        self.speed = random.randint(1, 3)

    def update(self):
        self.rect.y += self.speed


# 定义甜甜圈类
class Donut(GameObject):
    def __init__(self, x, y, image):
        super().__init__(x, y, image)
        self.speed = random.randint(1, 3)
        self.type = random.choice(["life", "bullet"])

    def update(self):
        self.rect.y += self.speed


# 定义游戏对象组
all_sprites = pygame.sprite.Group()
enemies = pygame.sprite.Group()
clouds = pygame.sprite.Group()
donuts = pygame.sprite.Group()

# 创建玩家对象
player = Player(WIDTH // 2, HEIGHT - 100, player_image)
all_sprites.add(player)

# 创建敌机对象
for i in range(6):
    enemy = Enemy(random.randint(0, WIDTH - enemy_image.get_width()), -i * 150, enemy_image)
    all_sprites.add(enemy)
    enemies.add(enemy)

# 游戏循环
clock = pygame.time.Clock()
running = True
while running:
    # 控制游戏帧率
    clock.tick(60)

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

    # 更新玩家
    keys = pygame.key.get_pressed()
    player.update(keys)

    # 更新子弹
    for bullet in player.bullets:
        bullet.update()
        if bullet.rect.bottom < 0:
            player.bullets.remove(bullet)
            all_sprites.remove(bullet)

    # 更新敌机
    for enemy in enemies:
        enemy.update()
        if enemy.rect.top > HEIGHT:
            enemies.remove(enemy)
            all_sprites.remove(enemy)
            new_enemy = Enemy(random.randint(0, WIDTH - enemy_image.get_width()), -enemy_image.get_height(), enemy_image)
            all_sprites.add(new_enemy)
            enemies.add(new_enemy)

        # 碰撞检测
        if pygame.sprite.spritecollide(enemy, player.bullets, True):
            explosion_sound.play()
            enemies.remove(enemy)
            all_sprites.remove(enemy)
            new_enemy = Enemy(random.randint(0, WIDTH - enemy_image.get_width()), -enemy_image.get_height(), enemy_image)
            all_sprites.add(new_enemy)
            enemies.add(new_enemy)

        if pygame.sprite.collide_rect(enemy, player):
            player.lives -= 1
            if player.lives == 0:
                running = False

    # 更新云朵
    if random.randint(0, 100) < 5:
        cloud = Cloud(random.randint(0, WIDTH - cloud_image.get_width()), -cloud_image.get_height(), cloud_image)
        all_sprites.add(cloud)
        clouds.add(cloud)

    for cloud in clouds:
        cloud.update()
        if cloud.rect.top > HEIGHT:
            clouds.remove(cloud)
            all_sprites.remove(cloud)

    # 更新甜甜圈
    if random.randint(0, 1000) < 5:
        donut = Donut(random.randint(0, WIDTH - donut_image.get_width()), -donut_image.get_height(), donut_image)
        all_sprites.add(donut)
        donuts.add(donut)

    for donut in donuts:
        donut.update()
        if donut.rect.top > HEIGHT:
            donuts.remove(donut)
            all_sprites.remove(donut)

        if pygame.sprite.collide_rect(donut, player):
            if donut.type == "life":
                player.lives += 1
            elif donut.type == "bullet":
                player.bullets.empty()

            donuts.remove(donut)
            all_sprites.remove(donut)

    # 绘制游戏界面
    screen.blit(bg_image, (0, 0))
    all_sprites.draw(screen)
    pygame.display.flip()

# 游戏结束处理
pygame.quit()

该游戏实现了碰撞检测、随机出现云朵和甜甜圈、GAME OVER条件控制等附加功能。其中，碰撞检测实现了子弹消灭敌机和敌机撞击玩家两种情况；随机出现的云朵和甜甜圈分别提供了景观和能量补给功能；游戏结束条件为玩家生命力值为0。