Simple, effective horror game.
A few bug fixes for you:
You can fix lighting issues bugging out on point lights by setting the render mode from auto to "important". This will make your lighting flicker less on surfaces. (This was a godsend for me when i started working in 3d).
I'd recommend a crosshair dot to help with players interacting with objects.
I had a bug where I was unable to start the end game scenario, though i wasn't able to repeat it on a second attempt.
Good work overall, especially for your first horror game! I love the monster model!