I tried to start with a few or more good things to say about your game, but I think the sound is the only good thing I find in this game.
I find the arm mechanic kills simplicity of this game by a lot. Reloading guns in VR game is easier than this. The dark environment in this game doesn't look too good. It's like the game is trying to hide some bad design or something but making everything dark is worse. NPC in this game is the only functional ai in this game.
I hope this would be useful feedback. Good job.