This game is flexible. But we didn't know HOW flexible it is.
Well we just learned, that we can take object models, and retexture them and put them into a level archive (for example, 1-1) and it will only affect that level and nothing else.
You heard me right.
We can have an orange goomba in 1-1 and a blue goomba in 1-2 and it will not affect any other model in the game.
This means we can have per-level customizations.