The idea is awesome and quite original, and from all the games I have tried so far, this is definitely in the top best looking games <3
Now, as many have pointed out before me, the game is incredibly hard, it literally took me around 10 attempts to reach the first chord change, and around 10 more to even reach the first enemies. I might try getting further later, but I'm not much of a game grinder, so it's hard doing that many attempts without getting desperate.
With that said, I really liked it, so congrats!!! :D