Gnarly starts with a layout where the player must keep on trying to go up before heading down onto the other side. There are numerous of Jump Blocks in this level that allows for easy jumping. However, there are Koopa Paratroopas placed in spots where the player may jump into one. After making it over and down the first area, the player can take the Warp Pipe to the second area where it's more linear. However, there is a Lakitu lurking in the area and an Amazing Flyin' Hammer Bro.. Making it to the Giant Gate completes this level and unlocks Tubular.