you're trying to make a horror game and you're not using shaders?
this isn't going to give anyone high hopes, especially when the hiding spaces are blatantly obvious and are simple to be seen under, and flashing lights to give you away.
hiding under tables has no point and it's not like the player being the alien won't just check every hiding space, you need to add areas that can't be accessed by the alien (but scarce to not ruin it), less lights, and an overall better build. it honestly is not a very good build, you could save a lot of bricks and make it look much better if the walls weren't made of 1x height bricks.