What a great little game!
I mean, essentially you're only doing busywork. This should not be fun. But it is. I have no idea what kind of witchcraft you used to make me enjoy the game as much as I did. I played until I had bought all of the upgrades and even then a little longer. I love all the small little touches like the animation of the music notes. I'm pretty sure, this is my favorite game out of all the submissions I have played. Amazing job! :)