Nicely done! I like the lighting and level design. You did a great job with play mechanics. I found the controls to be a bit difficult though with the spacebar for shooting. I tend to like one hand for WASD and the other on the mouse. If you added a mouse click input for shooting, that would make the controls feel much better. Overall, this is a very well done game! Congrats.
I'd love your feedback on my game as well. :)