The two-flashlight system actually works out pretty good an a gameplay element, while being the weapon as well as a light source. However, when navigating the verticle spaces (ramps, jumping, falling) the mouse position sometimes flickers and the light sources also flicker, even a slight bit. It does not affect gameplay, but sometimes it hurts my eyes and after a while, I do start to feel a little sick.
The music and the graphics are great, there is a really deep bass that creates a hell lot of pressure and unsure for the ambient. (also, the grenade launcher did not work for me when right-clicking)
Afterall, great work!