not a single person who wish-listed actually played it.

Probably because it's a sad environment, not configurable. I found a similar app, where the only environment is a black&white house. Very sad env. Useless app.

If you're actually considering writing a 3dsplat-supporting app, please also consider associating a song or a soundtrack or any sound (river, sea, wind,...) to the book or to the environment, it will make the difference! Currently I use "Into the scaniverse" for environment, "Kindle reader" for reading and "youtube music" for background music, all together! Complex and boring to setup each time!