As for this game itself, it's still nice to see you do 3D games. I like seeing such a different style and how your art style and direction is applied to 3D as it can be. This game does a nice job being what it is with its creepy atmosphere and off-settling nature, but it's not an inherently super compelling. The movement is claustrophobic and serves the mood, but it's also really slow and confining in a not fun way, and if this was expanded upon then my patience for waiting for the movement would wear thin. My favorite part strangely was turning: the slow, incremental turn, getting to see the nice wall textures up close, just this suspense and unease. It similarly would get very tiring if the game was longer and turning was needed, but for some reason I really liked it.
The colored diamond puzzle was too much thinking for me (at least right now at this hour...) so my solution felt more random brute force after like a dozen or two clicks than an intelligent puzzle solution I could feel proud of.
All and all, interesting to see you make different stuff like this. I like the diversity.