Clever as frick idea, executed wondrously. Currently no. 9 in the leaderboard, am definitely going to come back and try to claim the no. 1 spot.
My only complaint is that the coins mechanic seems slightly useless? As far as I could tell, they're only used for buying upgrades, but you're always going to have enough money to buy one of the three.
Amazing art and sound, and astounding polish