Cute idea, that really fits the theme well. What a chaotic game. It would be helpful if the buttons were not randomly assigned at the start of each song. Maybe making each performers position correspond to a similar position on the keyboard?
You're spot on with your feedback too. The button randomization was a bit of a blunder on my part. Thought it would make it more fun but instead I think it's more of a detriment to the game. Hope you had fun any way.