Impressive!
For the first time horror game developer, this is great.
Most of all, I enjoyed the atmosphere and monster design. The sound effect for the AI was creepy enough to match the tone, although, there were some minor issues, I should say about this. The sensitivity setting were a bit off, I think having the option for it would change the experience. Same goes for the flashlight, it was hard to see at times and the flashlight was clipping, you should probably look into that. Finally, the language barrier - I think translating couple of sentences and having an English language is not hard, but I do fully understand this is your first game and I do applaud this for being well-made.
Good luck with the future projects.