From the Super Mario Wiki
The player must close application windows on a computer by using the stylus. Windows are closed in any order by tapping either the red "X" button on the top right corner or the "OK" button on the bottom, which sometimes pops up after attempting to close another window. Unlike most computer operating systems, in this microgame, all windows can be dragged from any part and tapping or dragging a window behind another window does not bring the tapped or dragged window to the front. If time runs out and windows are still opened, the player will lose.
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