制作一个跳跃的小球游戏

代码如下：

import sys
import pygame

pygame.init()
size = width, height = 640, 480
screen = pygame.display.set_mode(size)
color = (0,0,0)

ball = pygame.image.load("ball.png")
ballrect = ball.get_rect()

speed = [5,5]

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
        ballrect = ballrect.move(speed)
        if ballrect.left < 0 or ballrect.right > width:
            speed[0] = -speed[0]
        if ballrect.top < 0 or ballrect.bottom >height:
            speed[1] = -speed[1]

        screen.fill(color)
        screen.blit(ball,ballrect)
        pygame.display.flip()

pygame.quit()

运行结果如下：