用Python创建游戏:如何添加游戏菜单？

import pygame

pygame.init()
screen = pygame.display.set_mode((800, 600))

def draw_menu():
    # 绘制菜单背景
    pygame.draw.rect(screen, (0, 0, 0), (0, 0, 800, 600))
    
    # 绘制菜单标题
    font = pygame.font.Font(None, 36)
    title = font.render("游戏菜单", True, (255, 255, 255))
    screen.blit(title, (350, 200))
    
    # 绘制菜单选项
    option1 = font.render("开始游戏", True, (255, 255, 255))
    screen.blit(option1, (380, 300))
    
    option2 = font.render("退出游戏", True, (255, 255, 255))
    screen.blit(option2, (380, 350))

def handle_menu_events():
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == pygame.MOUSEBUTTONDOWN:
            mouse_pos = pygame.mouse.get_pos()
            if 380 <= mouse_pos[0] <= 520 and 300 <= mouse_pos[1] <= 330:
                # 用户点击了开始游戏选项，执行相应操作
                start_game()
            elif 380 <= mouse_pos[0] <= 520 and 350 <= mouse_pos[1] <= 380:
                # 用户点击了退出游戏选项，执行相应操作
                pygame.quit()
                sys.exit()

def game_loop():
    while True:
        draw_menu()
        handle_menu_events()
        pygame.display.update()

if __name__ == "__main__":
    game_loop()