Creepy game! I was on the edge of my seat whenever I was hunting down the spirits. You have to keep track of the enemies at all times, because if you don't, they could appear out of nowhere and jumpscare you. And you have to conserve your syringes and not use the "monster-vision" mechanic too much, because you're going to be trouble if you do.
I had a hard time getting past the first round because of the huge map layout. Once I managed to get past it in one of my attempts, I accidentally ran into a demon and got a game over. :( I still had a good time playing the game, though.