I must admit that for a first effort, the game is absolutely awesome!
Horror games lately have been pretty tasteless and don't dare to try new things. But yours is actually different! From the aesthetic to the mechanics, the game feels and plays like a big title.
The post-processing makes the experience more immersive and definitely scarier. The presentation is straight from an 80s slasher movie and that is awesome in my book. The selection of the location where the game takes place is totally fitting too! An event/party like that in the middle of nowhere near an industrial zone is the perfect place for a plot like yours to take place.
Audio wise the game shines as well! The voice acting and the music are top notch and communicate the 80s era, especially the cinematic intro!
The pacing and the gameplay is polished and well thought. The game starts with the player feeling that something is going wrong and soon that hunch becomes reality. Then the killer appears and things go down. Having to find the required items that spawn randomly in the building is another obstacle. What isn't an obstacle though, is the A.I. The A.I. was never a factor that made the game feel frustrating. Crystal had excellent navigation and the killer was actually smart. If he spotted me he started chasing me and as soon he had lost me he started patrolling.
Also, I noticed that some meshes had a shader to emulate the PS1 texture warping and low float precision aka vertex jitter. Do you plan to make the whole game with this kind of aesthetic or it was there for experimentation's sake?
All in all, I had a lot of fun playing your game!! It's a pleasure to see indie devs make horror games that are polished and a unique experience!
Keep it up!! :D