save project

my_game.py

@@ -77,7 +77,7 @@ while True:
         rect = obstacle.get_rect()
         rect.x = 1000
         rect.y = 500 - rect.height
-        rect_x -= 8
+    rect.x -= 8
     screen.blit(obstacle, (rect.x, rect.y)) 
     # 刷新画面
     pygame.display.update()