Pretty good, just keep working of it.
I am a devoted fan of all of Jhonen Vasquez's work [Have you checked out the new fillerbunny? I just got it today!], and though I don't think that this was the least astounding, I could say that I would appreciate this animation as a kind of rough draft for a final product. I enjoyed the presentation, the way you cut from action to text, and your choice of backround audio. I highly suggest that you make another version of this animation with more effort, while incorperating those same ideas.
Now some criticism; first off, as you already explained and i already addresed, the graphics were completely unacceptable. Number two; WHY THE HECK WAS NNY BRIGHT YELLOW!?!? I understand that this was a half-assed, spur of the moment project, but this isn't a freaking episode of the simpsons. Third, I would like a little bit more action. Action you provided was a good partial outline of what was happeninf, but I would just like to see more happening. I understod that it was only little bits of action because that created a mood, but it kind of jumped foward with a couple of the shots. The continuity was messed up.
Finally, a suggestion. If you do make this into something bigger and better, how about a little backstory. Though Johhny needs very little explanation for killing somebody, he usually needs some. Just let us know what it is. That wouldn't hurt.
That's it so i guess I will keep browsing and blamming, and I am looking foward to seeing if you are going to elaborate and improve on this particular project. Good luck!