Fast-paced and interesting
Very well done. Only beef is the levels get monotonous figthing the exact same monster over and over.
Graphics- Decent, good enough to get the job done
Style- Very creative idea and gameplay. Excellent.
Sound- Good choice.
Violence- Could do better, not a whole lot of realism.
Interactivity- Good control, good variety of weapons and upgrades.
Overall-
Nicely done, I look forward to improvements.