alt Hacker NewsHah, very cool! I have a variation on that in an experimental version of some software I wrote and found it to be really interesting to compare experienced pianists' performance on it versus newbies. And that is the main reason why it is still unreleased, it is very hard to design a good educational tool so kudos on shipping!
Thanks jacquesm! I’ve met such a wide variety of pianists (jazz, pure extemporaneous players, hobbyists, strict Suzuki, etc.) that it would be very cool to see that kind of breakdown.