I like the fact that the enemies blend into the background when there is no light, but I find it disappointing that they are completely black when they are lit too. Maybe add some details/colors ?
Also I know nothing about firearms, but is this the right way to hold a shotgun ? It looks weird to me, but I am certainly used to the completely unrealistic Hollywood movies (Shwarzenegger, I'm talking to you).
Also, what are the target platforms ? :P