World 8-3 (Super Mario 3D Land)
From the Super Mario Wiki
This level requires 80 Star Medals to unlock. Its main theme is rotating cardboard platforms and the main enemies are Rocky Wrenches. The first section is made of giant cardboard boxes connected via rotating cardboard blocks and cylinders. Some Rocky Wrenches pilot small airships to toss wrenches at Mario. After the Midway Flag, Mario must cross more rotating plaforms until reach a pending platform which takes him to a Warp Box. It transports the player to another swinging platform. In the end, a safe area is found, containing two tiny carboard lifts and the Goal Pole.