From the Super Mario Wiki
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The objective of the game is to rub the top of the mountains to make them flat so that the helicopter can get past through the screen. If the player does not flatten the mountains, the helicopter crashes and the player loses the microgame. This microgame has twice the time to complete.
In WarioWare Gold, the player has to flatten the mountains so that a glider can pass through. Also, the timer is half as long as in WarioWare: Touched!, since the glider travels at a faster speed than the helicopter.
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