请用python输出一个塔防游戏

好的，以下是一个简单的塔防游戏的 Python 代码示例：

import pygame
import random

# 定义一些常量
WIDTH = 600
HEIGHT = 600
FPS = 30

# 初始化 Pygame
pygame.init()
pygame.mixer.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Tower Defense")

# 创建游戏时钟
clock = pygame.time.Clock()

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

# 定义游戏角色和其他变量
player = pygame.Rect(50, 50, 50, 50)
enemies = []
enemy_speed = 3
tower_image = pygame.image.load("tower.png")
towers = []

# 定义敌人类
class Enemy:
    def __init__(self):
        self.rect = pygame.Rect(random.randint(0, WIDTH), -50, 25, 25)
        self.speed = enemy_speed

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

    def draw(self):
        pygame.draw.rect(screen, RED, self.rect)

# 定义塔类
class Tower:
    def __init__(self, x, y):
        self.rect = pygame.Rect(x, y, 50, 50)
        self.target = None
        self.target_rect = None

    def update(self):
        if self.target is None:
            for enemy in enemies:
                if self.rect.colliderect(enemy.rect):
                    self.target = enemy
                    self.target_rect = pygame.Rect(self.target.rect.x, self.target.rect.y, 10, 10)
                    break
        else:
            if self.target_rect.colliderect(self.target.rect):
                self.target_rect = pygame.Rect(self.target.rect.x, self.target.rect.y, 10, 10)
            else:
                self.target_rect.x += 1 if self.target_rect.x < self.target.rect.x else -1
                self.target_rect.y += 1 if self.target_rect.y < self.target.rect.y else -1

            if not self.rect.colliderect(self.target_rect):
                self.target = None
                self.target_rect = None
        
    def draw(self):
        screen.blit(tower_image, self.rect)

# 游戏循环
running = True
while running:
    # 设置游戏帧率
    clock.tick(FPS)

    # 处理游戏事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        if event.type == pygame.MOUSEBUTTONUP:
            if event.button == 1:
                towers.append(Tower(event.pos[0] - 25, event.pos[1] - 25))

    # 更新游戏中的敌人
    for enemy in enemies:
        enemy.update()

    # 更新游戏中的塔
    for tower in towers:
        tower.update()

    # 绘制游戏界面
    screen.fill(WHITE)
    pygame.draw.rect(screen, GREEN, player)
    for enemy in enemies:
        enemy.draw()
    for tower in towers:
        tower.draw()

    # 生成新的敌人
    if random.randint(0, 100) < 5:
        enemies.append(Enemy())

    # 更新屏幕
    pygame.display.flip()

# 关闭 Pygame
pygame.quit()

注意：此代码未经测试，不保证可以正常运行。您可能需要添加更多的代码来完善游戏。