I died on first playthrough. I did manage to figure out how to find some artifacts and one of them even did a bit of a jumpscare with a big face coming at me. Also think I saw some swimmers under water? How'd they get there?Anyway didn't see my oxygen level or how to monitor so I died on the way up.
Anyway, pretty good game - I would suggest you add some sounds to the first room before getting in the elevator and also add some kind of a dot or pointer indicator to know what we're looking at.