Grade it for what it's worth, eh?
What??! A 0 for violence?!? Now, here I'm no dumb 14 year old, but violence does not necessarily make something better. I gave this a zero for violence because this is stupid violence that is intended for humor. Maybe I'm some sort of liberal freak, but cats getting hurt is not funny unless you're watching boondock saints, then it's sort of funny.
The graphic design is poor. The best looking thing in the game is the gun, and you see that for maybe 1/90th of the game. Once again, I'm not 14, but I don't think that putting OMFG on those barrels make them any better, either. One thing to consider is that the cat hitting those barrels and TNT and that box of explosive laughter (?) would not cause them to explode. Perhaps you might have considered a little more creativity. For example, the kitten (or something else, because hurting helpless animals hasn't been funny since 7th grade) could fall into a catapult, and there could be an angry old dog waiting there and he could cut the string and fire it. That would be pretty neat.
The lack of interactivity and music post kitten-launch makes for a boring game. Sitting there and watching it bounce is not very entertaining at all.
It's just not very nor funny. The kitten could at least be animated.
I say better luck next time.