auto save

my_game.py

@@ -64,7 +64,7 @@ while True:
         if index >= 5:
             index = 0
     # 将背景图画上去
-    shan_x -=2
+    shan_x -= 1
     if shan_x <-1000:
         shan_x=0
     screen.blit(background, (shan_x, 0))     # 远处背景