When the user wants to go back to the level select screen, all you do is again remove the post-it note that is on the paper currently, and add the post-it note that contains the level select screen.

当用户想回到关卡选择屏幕，所有你要做的是再次删除便笺纸，在纸上目前，并添加便条包含关卡选择屏幕。

youdao

When the user wants to go back to the level select screen, all you do is again remove the post-it note that is on the paper currently, and add the post-it note that contains the level select screen.

当用户想回到关卡选择屏幕，所有你要做的是再次删除便笺纸，在纸上目前，并添加便条包含关卡选择屏幕。

youdao