The creepy atmosphere was good, and I liked the art. A little variety on the people we killed would be cool too, instead them all being the same guy with a beanie.
I found that a lot of times when pulling a body I would be getting pushed somewhere else, and it made it hard to get back to the plant.
Now I know it'd be hard to figure out where to place this, but I think it'd be cool if the setting was in a real place, rather than an abstraction.
One thing I really want, is some thing to change as you kill more and more people. Maybe like status updates? Like our player starts to enjoy it? Something like that would really add to the already good atmosphere you got here.
Btw, the max I was able to get was 7.