World 6-5 (Super Mario 3D Land)
From the Super Mario Wiki
This snow level can be unlocked with sixty Star Medals. Mario starts in a snow platform with flowers. Going ahead, he must jump to the top of a high cliff using a bouncy platform. There are a Paragoomba and another bouncy platform, now in a short rail. Using it, Mario must go to another giant ice block structure, where a small Goomba Tower is found. Passing these Goombas, Mario must ride a bouncy platforms in rails, crossing Goombas, Brick Blocks and icy walls. Then, he must jump to a big ice platform, where the Checkpoint Flag can be touched. Going to the right, the plumber sees three bouncy boards to reach on the other side of an icy wall, where are more bouncy platforms and a Red Ring. Above a high cliff, he will face Goomba Towers until ride a rail bouncy board, using also wood walls, Donut Blocks and stationary orange platforms. Mario will see a pass between two ice block walls. There are the three last bouncy platforms, used to reach on the Goal Pole.