EDIT: I've just watched your youtube video and there seemed to be definitely something wrong. when i launch the game the camera doesn't follow the player, there is only one tile of the map and only one enemy.
-- ORIGINAL COMMENT --
Love the concept and the artstyle!
The idea of deciding how much light to use is nice, but it kinda felt awkward when you have to also point with the mouse to shoot.
At first the game was crashing all the time in the embedded player, but not in standalone. I think it's the particles when the bullets hit that cause the problem. I'm not sure if i touched anything or not, but, after a few tries the particles started working in the standalone player too and made it crash as well. Not sure if the UPBGE version is at fault, what version is it made with?
The enemy has a crazy amount of health! :D