Thanks, Everbro! That's very flattering.
We had one play-tester and the most valuable feedback we got from that session was that the controls were not self-evident, especially because of the variety of control schemes. You don't really have a lot of time to adapt to new controls. So we added the button hints and made some of the challenges easier. Given more time, we'd definitely want to think about how the games build off each other to gradually teach you how the varied controls work.