Cool! My suggestion would be to make it more mobile friendly. I suspect any regular user will be near their piano, and using a computer or laptop there can be t

Cool! My suggestion would be to make it more mobile friendly. I suspect any regular user will be near their piano, and using a computer or laptop there can be tricky! So I bet phones would be very common for people without a tablet. The UI is just very small on a phone. While I understand why that may need to be the case for the actual keys, everything else should be significantly larger.