My thoughts on this game are as follows.
I like the gun with how it has a bullet trail, very nice touch you thought of. Another thing I'd like to mention that I like is the vast amount of enemies to attack so I get a lot out of my short gameplay.
However, my main complaint is the lighting. I don't know if it's intentional, but most of the map was barely visible due to the bright overhead light illuminating everything a bright white.
Apart from that, good job.