I liked the visuals of this, and the music fit. The UI is nice and simple. I wasn’t sure what the phone did or if I could interact with it. I saw some other comments that said this, but yeah I would try and avoid the jumpscare route. Building up the atmosphere in this game would make it a lot scarier I think.
Players don’t necessarily need to see a monster, but just feel like it could show up at anytime. Try to take out all the jumpscares and have someone else play it in front of you. If they keep looking behind them in the game, you’ve built some atmosphere just by having cool visuals. Maybe try adding some rustling noises here and there. These are just ideas, hope that all makes sense.