Ah I loved this one! Such a great idea for a game...
My only feedback would be that I would love to be able to hear how the new instrument I'm selecting is going to sound before I place it. I found myself way more into trying to create a groove than optimising the positions for damage
I'm also a big fan of the choose 1-of-3 things games! We created a deckbuilder, so would love your feedback if you want to give it a try