Man am I terrible at horror games. That, or the game was just very difficult. Probably the latter. This was a pretty good and pretty scary experience. You've done well with the lighting and the mechanic of the monster hopping around randomly when lightning strikes. More than once I was searching through a room only to have him pop up right in front of me, eliciting some very embarrassing reactions as I quickly scrambled out of the rooms.
Things I can complain about being thusly:
-The flashlight runs through power a bit too quickly, many runs I had to intentionally die and restart as I was wholly unable to effectively navigate once I ran out of batteries.
-The camera's motion smoothing made controlling the character very tedious and difficult. That would not be much of an issue if most of the things you interact with weren't tiny objects like keys or batteries... but they are, and their collision boxes are quite unforgiving.
Other than that the game was quite alright. Your team did a good job making a full-fledged indie horror game. The type of thing I would see in a video by Markiplier or some other gaming youtuber.
Well done.