Oh, and before I forget again: I really wasn't a fan of how the solid-white room near the end of the game had coins in unreachable locations. Even though I had gotten all the notes in that level, I thought maybe there was another key in that world or something that the coins were hinting towards, except no, I ended up falling to my death. Please remove all the coins that are below the platforms in that room, then lower the three coins in the top-right so they can be reached.