I had some more stuff in the oven but couldnt implement it because of time constraints (for instance, I have another enemy that was full metallic robot, and I thought it would be a nice Idea to make it follow you and explode when it was near enough) I barely had time to implement the enemies with shotguns and rifles for the last level.
Of course, I just rated your game (I always have time to rate the games of those who rate mine :D). Excellent Job, Its a pretty interesting concept.