The game looks pretty promising but I think it's current state is too unfinished, even for a demo. The ambiance is very well made, it's nicely backed up by the visual and sound design but the gameplay really takes a toll in the experience as a whole.
There are lots of empty bits that feel unfinished, most empty walking sections would benefit from having more text, things to see or noise stimuli, making the player wonder a bit more about what may happen instead of just mindlessly and boringly walk.
Lastly, the ammount of glitches is just absurd. I know this is a demo and I'm sure the final game will solve most of them. However as it is it takes away from the experience making this feel more like a beta rather than a demo.
All of this problems are solvable though, and I'll make sure to stay tuned for any future updates. Good luck with the project!
Edit: I just read the page again and found out this is your first game ever. This is actually really good for a first project, despite the glitcehs and the lack of gameplay (which are understadably hard to get right without that much experience), the game is actually pretty well designed, so good job