So believe it or not, buying characters was left on the cutting room floor. We called it the "hiring" system. We just didn't have enough time to implement it, and figured the thing people would want to customize the most would be their moveset.
Oh and thank you for the music compliment!! I love composing for my games.
Also yes, we're well aware of the game's accidental insanely easy difficulty, and we're equally sorry for that, but I'm glad you still had fun regardless!!