World 4-A (New Super Mario Bros. 2)
From the Super Mario Wiki
This level is full of Mushroom Trampolines. First, Mario can see the first Star Coin and two Goombas that are bouncing on the mushrooms below a long orange platform. This is followed by several ? Blocks, one of which contains a Fire Flower. There are pipes which releases Goombas to the bouncy mushroom platforms. After crossing there is a Red Ring. Further down are some Goombas and the checkpoint. More bouncy mushroom platforms can then be found along with a single Coin Roulette Block. More Goomba-releasing pipes can be found above several mushroom platforms and orange platforms. Another long orange platform can be found. This platform is low enough to cause bouncing Goombas from Goomba-releasing pipes below to reach the long orange platform. After that are several more bouncy mushroom platforms along with bouncing Goombas, and the Goal Pole.