The fixed camera first person 3D gives me an old school Myst-like vibe. Mazes used to be a really common thing in adventure games but I never see them anymore! So I think that will really appeal to players who enjoy those kinds of old-school gaming. (Also thank god you put the symbols on the floor or I would have given up in 5 seconds.)
I had a little trouble with the controls because sometimes it seemed like different areas had different controls for the same things? For instance, in the opening room you click on objects to examine them, but in a later room there's a visual novel-style prompt where you choose what to examine. So it would have been nice if those were more consistent.