From the Super Mario Wiki
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This level has several long cloud platforms, a few scattered smaller platforms, Coins on several of the platforms, and Koopa Paratroopas positioned between some of them. In the first half of the level, wind will be blowing from the left, and Cheep Cheeps will jump up from below throughout the level. Above the second small platform, after the Blooper, is a Hidden Block with a power-up. Just before the Goal Pole is a Springboard that can help the player over the Goal Pole and reach a Warp Zone leading to World C.