save project

my_game.py

@@ -76,7 +76,7 @@ while True:
     if obstacle.rect.x <= 0-obstacle.rect.width:      # 障碍物消失
         # 创建障碍物对象
         obstacle = Block(stone , cacti ,bush)
-    rect.x -= 8
+    obstacle.rect.x -= 8
     screen.blit(obstacle.image, (obstacle.rect.x,obstacle.rect.y)) 
     # 刷新画面
     pygame.display.update()