I appreciate all the thought you're putting into the game and I hope you achieve your vision.
In the interests of helping you make it a success, I'll offer the following feedback which I hope will be useful and constructive:
1. Reiterating my original comment first: Keep It Simple. Too many menu options and branching trees for skills or crafting sucks you out of the game instead of into it. If the total experience is 1-2 hours long, that's enough time to learn to play and enjoy checkers but not chess.
2. Tweak the procedural generation to maximize the length and width of corridors and to make turn radii larger. If the player is going north and you want to turn them south, let them walk around a more gradual bend. I've found that the current prevalence of tight turns makes me nauseous (and I have pretty good VR legs).
3. The areas with the gondola/ski-lift moving platforms are nice in that they open up the space a lot. They would be a lot more comfortable if they were a bit larger though. Maybe make them 2x2 instead of 1x2. Again, the tight turning is a bit nauseating. Also, the game's moving platforms are too fast which causes nausea and disorientation.
4. I recall seeing a moving train with cars on it and a turret on the other side. The goal being to use that cover. I would lean toward making the direction of the boxcars the same as the direction you need to move. Beyond that, I like the idea of jumping onto a moving conveyor or train and then avoiding bullets and shooting enemies much like Pistol Whip. Just make sure that the enemies appear ahead of you in the direction you're moving. Looking too much to the side while on a moving platform alto triggers nausea.
5. In such tight confines, too many exploding robots can be frustrating.
I love what you're doing with Tea For God. Your work with procedural generation and non-Euclidean spaces is cutting edge. Kudos for your creativity and hard work. I wish you great success turning this into a commercial product. I hope that my feedback helps tweak that final product so that it provides an improved user experience, gets solid reviews, and catches fire. Cheers!