This looks fantastic. Would love to play this, but I'm afraid I can't deal with the movement in this game. I'd also recommend adding teleport, at least as an option. And even for smooth locomotion, I'd make the movement direction depend solely on the hands and not the head orientation (if I move forward and rotate my head to look around, I keep moving in the direction I'm looking, adding to the nausea).
Let me know if you do patch in teleport, I'd love to try this and rate it based on its other merits.