What the: Some sort of runway? What for? This game makes no sense. I also made a music piece. An underground remix. It won't win me any awards, but it certainly checks off the custom music box on my list of things I want in my Mario games.
EDIT: A badly kept secret revealed in the last screenshot, you will ride a motorbike in this game. Like in Mario Kart. I know, it's wild, but you just have to trust me...