This is very nice. I’m curious as to how the Player input works. I do understand going for niche, but, there is a whole market for those who enjoy interactive/non-interactive audio.
I’ve started designing Audio-based Game implementation on paper months back. My approach is to design the Game in full 3D using a Glorified Logging System to output Actions/Events in a text-based markup language that triggers 3D Audio Cues, Vocals, Music. 