That was really easily overlooked. I didn't find it right away even after being told there was a link. Putting the help link by the piano would have been useful I suppose. But a web app that you need to read the help file in order to figure out how to do ANYTHING in the app seems like a big miss to me. Not trying to be dismissive; UX is really important if you want adoption. It might not matter at all for a hobby project; maybe that's not the author's goal. That's fine, but I think the feedback is still fair.
