From the Super Mario Wiki
The level begins with some big enemies, along with a path above. Mario must drop down from that path once it ends to be led to an area with a Big Chain Chomp. After a while, Mario must hit a P Switch and enter a P Door to defeat a Blooper and steal its Fire Koopa Clown Car, riding it to a Checkpoint Flag and another P Switch. Heading further right, Mario will encounter some Rocky Wrenches in more Fire Koopa Clown Cars, along with some big Rocky Wrenches. Afterwards, Mario will reach the Goal Pole, guarded by a big winged Blooper Nanny on a track.
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