One of the better Demos Indie Horror games I've played on this site! Gave me some Outlast vibes, too. There were a few language errors when it came to dialogue and subtitles not matching up.
Well done! Here's my playthrough of the game:
Some critique:
The battery collecting seemed a little insignificant for the demo but looking forward to its use in the full game (hopefully not a chore).
Also, I cracked the upstairs puzzle combination box, left without getting the key, and came back to read the paper and couldn't, freezing the game (timestamp: 10:03). Might be a glitch in the paper/ key item interaction. Wasn't major, but I did have to restart because of it.