Thank you so much for playing!
Agree with your feedback, the lack of control clarity/intuitiveness is definitely the biggest disappointment for me. It traces back to the timeline/scrubber addition which wasn't part of the original design (it was just the beats originally), but I think is what really makes the core mechanics shine... So I'm glad it's there, just wish I had thought of it from the start so the HUD/controls were better considered as a whole!