I think there may be some build errors, the debug window is stuck open when I boot the game. From what I could play of it, I had a hard time. It's difficult to tell if I'm actually shooting the enemies, and a bit frustrating that you can't run really run away from them. I did manage to kill one, but it slid along the floor after finishing it's death animation and killed me anyways.
I think visually it's pretty decent for a first game, it just needs some work on the gameplay front.