From the Super Mario Wiki
The level starts in a cloudy area next to a Mega ? Block containing a 1-Up Mushroom above two Brick Blocks. The second Brick Block contains a P Switch. A few groups of Para-Beetles are found, along with a ? Block containing either a Super Mushroom or a Super Acorn, depending on the player's form. A Heavy Para-Beetle with a P Switch, along with a Para-Beetle carrying a Piranha Plant on its back. A few Para-Beetles fly from the left side of the screen, and two are found carrying a P Switch. A Heavy Para-Beetle is found next to a platform. Two Para-Beetles, a Red Ring, and a group of Banzai Bills are then encountered. A Heavy Para-Beetle carrying a P Switch is found, followed by one carrying a Piranha Plant. A King Bill then flies above. Para-Beetles carrying Piranha Plants and Big Piranha Plants are found, along with more Heavy Para-Beetles with P Switches. After a second King Bill, the player reaches the Goal Pole.
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