With more fluid I mean that you need to stop becouse the blackness makes you not undedrstand where to go! It might be cool to use light occlusion nodes and some envoirement elements that are resilient ! So that the player knows that certain points / crystals/ rocks are there. I think that would improve the experience and let the player play in a more "fluid way" without needing to stop and understand where is he going and what does it need to do.
Other creatures make noize so they should be pretty much detectable without emitting wawes.
Any way the idea is cool. keep it up adding more features. And some puzzle envoirements.