First thing I noticed was that its extremely dark, you can’t see anything if you’re graphic level is at least 4. And as @Gemini_DCXVI mentioned, there isn’t a clear objective. I followed the instructions you provided yet still nothing happened. The build of it isn’t too bad although I recommending changing from the plastic material to smooth plastic or metal. Another key thing for horror games is the sound design; Currently you just hear the default footsteps sound throughout the whole game, which makes it feel empty and bland. I suggest adding some custom footstep sound along with maybe an echo effect as well as some background ambience and game sound, like sirens from the police cars I noticed outside.
My character is taller than the doors, and I recommend adding more textures to the walls as well as making the hallways brighter. It also seems like there is a glass window to see the outside that doesn’t seem to look like a window at all but rather an invisible block.