From the Super Mario Wiki
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The player starts off on a platform next to some platforms that sink into the lava if they are stood on. After these is a platform that spins in the direction that it is run on, which leads to a Warp Box.
The Warp Box leads to an area with a Dry Bones and a platform that moves when stood on. This platform goes to a cylindrical mesh that leads to a rotating platform with a Warp Box at the end. The Warp Box leads to the final area which has another cylindrical mesh and the Goal Pole.