World 6-3 (Super Mario Maker for Nintendo 3DS)
From the Super Mario Wiki
World 6-3 is the third level of World 6 of Super Mario Challenge from Super Mario Maker for Nintendo 3DS.
The level begins with some Bumpers on a track. There is a Super Mushroom with wings before the Warp Pipe. In the sub area, more Bumpers followed by a Lift appear. The Lift will carry a Fire Flower once it reaches it. While on it, the player must avoid a Grinder, 3 high walls with 2 Hard Blocks and 6 Coins between each wall. After the Bumpers climb, they fall down to another track. After some loops, they fall off screen. Luckily, there are new Bumpers available to take the player to the end. These bumpers go along a curvier track. At the end, they fall down to another track which is straight and stay there. The Warp Pipe back is above. After taking the pipe, a Checkpoint Flag is available to the player. After the checkpoint, more bumpers. After some time, more Bumpers and even a Grinder go between two tracks. After this, more curves and even Koopa Paratroopas. At the end of the track is the Giant Gate.