Meh
Well the animation was pretty good, but the graphics were just...bleh. South Park can pull it off, but most other things can't, your graphics were much rougher too, which just made it look like not very good drawings.
Personally I found this pretty tedious except for a couple of points; I'm not particularly into the whole going-around-shooting-people thing though, so naturally I wouldn't find it too interesting. You should really add some more over the top things for people like me who find guns boring.
The code in general was well done I suppose, but I still didn't feel particularly involved in the story.
Overall I'd say it was mediocre, another NG piece a lot like many many others. People here seem to like it though, so just keep making them and you'll be fine I guess.