I'm trying this after the realms deep coverage. For full transparency I gave up after the breaker puzzle.
I like the atmosphere and I applaud the effort, but I don't think the demo shows this project in the best light, and I want to relay some feedback that caused me to not massively enjoy where I got to in the demo.
1. The mouse smoothing/delay genuinely made me quite motion sick. Seriously recommend either having that off altogether or having a toggle. Bonus points for an FOV slider as well.
2. Adjustable brightness. Some sections were far too dark to see what was actually happening on my monitor. I think a brightness slider could have helped alleviate that.
3. Searching around for the supplies at the start felt a little too clunky e.g., opening drawers felt imprecise and it took me far too long to notice the supplies in the room with the hospital beds.
4. Having the demo reset to the cutscene prior to the breaker puzzle was genuinely infuriating. I think a checkpoint could have helped to alleviate that, but I spent a lot of time trying to actually find the switches/breakers which felt a little too masked by shadows/darkness.
I think you have a really cool concept here, but I think I was more drawn in by the interactive/combat forward sections presented in the trailer. My concern would be that this goes down a mostly clunky amnesia route. Still, I'll be sure to check up on any later updates and give it a fair shot.
Best of luck with development.