That was fun. My notes got wiped but I don't know if I accidentally did that, so definitely needed the hint button good idea keeping that in I'd be impressed if someone completes it without the hints.
Only issue and it is quite a big one for gameplay: I had to keep clicking on the number until it randomly decided to accept my input and then a couple of times I would input it twice in a row when I didn't mean to.
Well done though I really liked the concept and had fun playing!