I want to see this built out more! I love the premise of turning a rhythm game into a pickpocket game. It’s like a different flavor of Rhythm Thief. The hand you drew is gorgeous and I can only imagine what the rest of the game would look like with a bit more time.
I’m guessing you already though through this but maybe for an added layer of difficulty you could have another beat running that the player needs to hit a different key for to evade police or something. Anyways a fun simple game you put together with a lot of places you could run with it!