Really Rolling Hills
From the Super Mario Wiki
Really Rolling Hills, or World 2-4, is the tenth regular level of Super Mario 3D World and the fourth one in World 2. It is unlocked via completing Puffprod Peaks or Shadow-Play Alley, and its own completion unlocks Big Galoomba Blockade. The main gimmick of this level is the hills that constantly turn in circles.
The level starts in a grassy plain inhabited by Galoombas and Skipsqueaks, with a nearby ? Block giving the player a power-up. After passing some more enemies, rolling hills, and a Red Ring, the player reaches the Checkpoint Flag. A nearby pipe leads the player to an underground area infested with Galoombas, Spiny Skipsqueaks, and cog-like platforms. After navigating through the area, the player comes upon a pipe which leads them to the Goal Pole.
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