如何使用pygame创建多个侧向移动的精灵对象(如T-rex游戏)

import pygame
import sys

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

class Sprite(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.image = pygame.image.load('sprite_image.png')
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y
        self.speed = 5

sprites = pygame.sprite.Group()

sprite1 = Sprite(100, 200)
sprites.add(sprite1)

sprite2 = Sprite(300, 200)
sprites.add(sprite2)

# 可以创建更多的精灵对象...

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        sprite1.rect.x -= sprite1.speed
        sprite2.rect.x -= sprite2.speed

    if keys[pygame.K_RIGHT]:
        sprite1.rect.x += sprite1.speed
        sprite2.rect.x += sprite2.speed

    screen.fill((255, 255, 255))
    sprites.draw(screen)
    pygame.display.flip()