Really love the music!
I like just about everything, the music, the pixel art and the concept was great! I do have some feedback though: First is just about what everyone else said that the screen shake is too much also that the morale goes down to fast. The next thing is that once you find the ghost and shoot them the round should just end you should not have to go find the exit because that's just a lot of walking around and by then your morale is almost out anyways.
Overall I like the game! With a little work it can be great! Also I really like the lighting!