python---pygame小游戏

import pygame as pg
import sys
import time
import random
pg.init()
game_window=pg.display.set_mode((600,500))
pg.display.set_caption('game')
window_color=(0,0,255)
ball_color=(255,165,0)
rect_color=(255,0,0)
ball_x=random.randint(20,580)
ball_y=20
move_x=1
move_y=1
score=0
count=0
point=1
font=pg.font.Font(None,70)
while True:
    game_window.fill(window_color)
    for event in pg.event.get():
        if event.type==pg.QUIT:
            sys.exit()
    mouse_x,mouse_y=pg.mouse.get_pos()
    pg.draw.circle(game_window,ball_color,(ball_x,ball_y),20)
    pg.draw.rect(game_window,rect_color,(mouse_x,490,100,10))
    ball_x+=move_x
    ball_y+=move_y
    my_text=font.render(str(score),False,(255,255,255))
    game_window.blit(my_text,(500,30))
    if ball_x<20 or ball_x>580:
        move_x=-move_x
    if ball_y<20:
        move_y=-move_y
    elif mouse_x-20<ball_x<mouse_x+120 and ball_y>470:
        move_y=-move_y
        #加分并且加快速度
        score+=point
        count+=1
        if count==3:
            count=0
            point+=point
            if move_x>0:
                move_x+=1
            else:
                move_x-=1
            move_y-=1
    elif ball_y>=480 and (ball_x<mouse_x-20 or ball_x>mouse_x+120):
        break
    pg.display.update()
    time.sleep(0.005)