Just remix and then see inside and put the pieces together to create a level. Each level piece is separate to make designing a level easier. All the coding is already in the project; once someone designs a level they can test it themself. 15-17 costumes are needed per level(except for boss battles).
Don't worry about glitches/problems with Diddy or the backdrops because they will be fixed when levels are transferred into the game.
