I am a big sucker for the PS1/Saturn aesthetic especially when it comes to horror games. The environment/ art style is excellent, don't change anything about it. The camera moves are especially on point but I think you just need more variety in the enemies. Not just in design, but behavior as well. In House of the Dead the zombies would behave differently from screen to screen, they'd pick up scientists and throw them, barge out of doors, throw axes, etc. And depending on where you shot them a different piece would explode. I think you have something good here, reminded me of a type of game that's long since died out.