From the Super Mario Wiki
The level is entirely set on two clouds, with three grass wheels set side by side between the two. If the player stands on the edge of one of the wheels, it will rotate in the direction of where the player is standing. Along the wheels are blue platforms. To collect the Power Star, the player must stand on the edges of the wheels to move the blue platforms so they line up towards the Power Star. Once the platforms have been positioned correctly, the player can use a blue pipe to travel up to a higher platform, and then cross the platforms to reach the Power Star.
There is an 8-bit Luigi at the bottom of the first wheel. It can be seen by going down to the bottom of the level or by spinning it upwards.
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