I tested both on Firefox and Chrome (on Linux).
One key point is that I set the zoom to 150%; when it's the case, the vertical size of the left panel changes when (un)folding, which changes the aspect ratio of the right panel.
That's so cool! I'm glad it inspired you to accomplish what you have been putting off for ages. I do think an alternative and more visual/tactile experience can help some people approach music from a different prospective they might be accustomed to. There's definitely room for improvement. If you have any specific suggestions for your use case please let me know. Thanks for checking it out!
I had a think about it as I was writing that comment, and honestly, all I think you're missing is tap tempo. That's it. I thought that maybe the ability to set a different scale for each of the four different instruments would be cool, but I'm not sure that it wouldn't complicate the UX too much. Tap tempo, though, would be useful and I imagine fairly easy to implement.
It should just work if you start tapping notes or press play. Make sure the phone's sound toggle is not muted. I'm not sure of any other reason it wouldn't work. Are you using Safari?
Thanks for the input. I'm hoping a simple tutorial will help with finding the playback direction buttons. I'm not sure what to do about the fat-fingering problem. Maybe the controls could be bigger.
