The first thing I noticed was that you avoided the writing pitfalls of certain-jams-I-won't-name that went overboard with infodumps that were too big for the scale of their game so I really appreciated the change of pace
Judging this as a prototype, I feel this demo shows me that 3D maze games are even easier to get lost in than 2D mazes. That first floor despite its small size is big enough that I needed to focus to not lose my sense of direction. Also not used to the controls which feels like you're driving a vehicle through the maze. Overall while an interesting subversion of the troll games from last year, I think 3D maze dungeons are more terrifying than 2D but probably an idea to go for a horror RPG for later. Maybe
EDIT: BTW I like that cat