This is a very cool idea, I love when people use gaming as a medium beyond just entertainment and try to make people think or feel something. However I have a couple suggestions and believe that some changes could be needed.
VR support would be nice and is easy enough with Unreal Engine. A photo-realistic horror/puzzle game or whatever this is would be very nice.
Depth of field looks great in movies, but it doesn't in games because the center of the screen isn't always where your eyes are looking, so quite often the area you're looking at is out of focus.
A option to change from 4:3 to 16:9 would be nice, though perhaps this was intentionally left 4:3 to create a claustrophobic atmosphere which is understandable but still some people might see the 4:3, realize there are no options and just quit right there.
Also please use a different sound for eating it's just unpleasant and not the disturbing unpleasant, it's just bad.
Looking forward to seeing the world you're building :)