Hey, thanks for your comment! I really appreciate you playing our game!
We definitely felt some of your pain points with the game while developing; we are considering making changes / additions to the game after the judging period (i.e. different kinds of avoidable notes, better readability, better timing judgements, etc...). We'll definitely take your feedback into consideration if/when the time comes!
As for theming, we interpreted scale by aligning the tones played when moving around the play field to the tetratonic music scale, hence the name of our game!