利用Python写了一个水果忍者小游戏

import pygame, sys
import os
import random

# 游戏窗口
WIDTH = 800
HEIGHT = 500
FPS = 15             # gameDisplay的帧率，1/12秒刷新一次
pygame.init()
pygame.display.set_caption('水果忍者') # 标题
gameDisplay = pygame.display.set_mode((WIDTH, HEIGHT)) # 固定窗口大小
clock = pygame.time.Clock()
# 用到的颜色
WHITE = (255,255,255)
BLACK = (0,0,0)
RED = (255,0,0)
GREEN = (0,255,0)
BLUE = (0,0,255)

background = pygame.image.load('背景.jpg') # 背景
font = pygame.font.Font(os.path.join(os.getcwd(), 'comic.ttf'), 42) # 字体
score_text = font.render('Score : ' + str(score), True, (255, 255, 255)) # 得分字体样式

def generate_random_fruits(fruit):
fruit_path = "images/" + fruit + ".png"
data[fruit] = {
'img': pygame.image.load(fruit_path),
 'x' : random.randint(100,500),
 'y' : 800,
'speed_x': random.randint(-10,10),
'speed_y': random.randint(-80, -60),
 'throw': False,
 't': 0,
'hit': False,
 }
if random.random() >= 0.75:
data[fruit]['throw'] = True
else:
data[fruit]['throw'] = False
data = {}
for fruit in fruits:
generate_random_fruits(fruit)

font_name = pygame.font.match_font('comic.ttf')
def draw_text(display, text, size, x, y):
font = pygame.font.Font(font_name, size)
text_surface = font.render(text, True, WHITE)
text_rect = text_surface.get_rect()
 text_rect.midtop = (x, y)
 gameDisplay.blit(text_surface, text_rect)

# 绘制玩家的生命
def draw_lives(display, x, y, lives, image) :
for i in range(lives) :
img = pygame.image.load(image)
img_rect = img.get_rect()
img_rect.x = int(x + 35 * i)
img_rect.y = y
display.blit(img, img_rect)

def hide_cross_lives(x, y):
gameDisplay.blit(pygame.image.load("images/red_lives.png"), (x, y))

def show_gameover_screen():
    gameDisplay.blit(background, (0,0))
   draw_text(gameDisplay, "FRUIT NINJA!", 90, WIDTH / 2, HEIGHT / 4)
    if not game_over :
        draw_text(gameDisplay,"Score : " + str(score), 50, WIDTH / 2, HEIGHT /2)
   draw_text(gameDisplay, "Press a key to begin!", 64, WIDTH / 2, HEIGHT * 3 / 4)
   pygame.display.flip()
    waiting = True
    while waiting:
     clock.tick(FPS)
      for event in pygame.event.get():
           if event.type == pygame.QUIT:
            pygame.quit()
          if event.type == pygame.KEYUP:
         waiting = False

first_round = True
game_over = True        
game_running = True    
while game_running :
   if game_over :
      if first_round :
        show_gameover_screen()
         first_round = False
      game_over = False
       player_lives = 3
       draw_lives(gameDisplay, 690, 5, player_lives, 'images/red_lives.png')
       score = 0
   for event in pygame.event.get():
       if event.type == pygame.QUIT:
         game_running = False
   gameDisplay.blit(background, (0, 0))
   gameDisplay.blit(score_text, (0, 0))
    draw_lives(gameDisplay, 690, 5, player_lives, 'images/red_lives.png')
   for key, value in data.items():
        if value['throw']:
          value['x'] += value['speed_x']
      value['y'] += value['speed_y']
            value['speed_y'] += (1 * value['t'])
          value['t'] += 1
           if value['y'] <= 800:
                gameDisplay.blit(value['img'], (value['x'], value['y']))
           else:
               generate_random_fruits(key)
          current_position = pygame.mouse.get_pos()
           if not value['hit'] and current_position[0] > value['x'] and current_position[0] < value['x']+60 \
                    and current_position[1] > value['y'] and current_position[1] < value['y']+60:
                if key == 'bomb':
                   player_lives -= 1
                  if player_lives == 0:
                  elif player_lives == 1 :
                      hide_cross_lives(725, 15)
                   elif player_lives == 2 :
                      hide_cross_lives(760, 15)
                  if player_lives < 0 :
                       show_gameover_screen()
             game_over = True
                    half_fruit_path = "images/explosion.png"
                else:
                   half_fruit_path = "images/" + "half_" + key + ".png"
                value['img'] = pygame.image.load(half_fruit_path)
                value['speed_x'] += 10
               if key != 'bomb' :
                    score += 1
               score_text = font.render('Score : ' + str(score), True, (255, 255, 255))
                value['hit'] = True
        else:
            generate_random_fruits(key)
    pygame.display.update()
    clock.tick(FPS)
pygame.quit()