得分/吃苹果以获得积分的Pygame问题

import pygame
import sys

# 初始化Pygame
pygame.init()

# 设置窗口大小
screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("吃苹果得分")

# 加载图像
player_img = pygame.image.load("player.png")
apple_img = pygame.image.load("apple.png")

# 玩家初始位置
player_x = 400
player_y = 500

# 苹果初始位置
apple_x = 200
apple_y = 300

# 得分
score = 0

# 游戏时钟
clock = pygame.time.Clock()

# 游戏主循环
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    # 获取键盘输入
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        player_x -= 5
    if keys[pygame.K_RIGHT]:
        player_x += 5
    if keys[pygame.K_UP]:
        player_y -= 5
    if keys[pygame.K_DOWN]:
        player_y += 5

    # 检测碰撞
    if (player_x < apple_x + apple_img.get_width() and
        player_x + player_img.get_width() > apple_x and
        player_y < apple_y + apple_img.get_height() and
        player_y + player_img.get_height() > apple_y):
        score += 1
        apple_x = pygame.Rect(0, 0, 800, 600).move_ip(pygame.Vector2(800, 600)).x
        apple_y = pygame.Rect(0, 0, 800, 600).move_ip(pygame.Vector2(800, 600)).y

    # 绘制屏幕
    screen.fill((255, 255, 255))
    screen.blit(player_img, (player_x, player_y))
    screen.blit(apple_img, (apple_x, apple_y))

    # 显示得分
    font = pygame.font.Font(None, 36)
    text = font.render(f"Score: {score}", True, (0, 0, 0))
    screen.blit(text, (10, 10))

    # 更新屏幕
    pygame.display.flip()

    # 控制帧率
    clock.tick(60)