Not bad all round

The animation and artwork were quite impressive. Storyline was nothing particularly special (but how often is it in a flash of any kind?).

Mostly, the thing that brought it down was the offputting swaps between a depression/anger/revenge storyline and some slapped in humour.
It was kind of a case of some bits attempting to appeal to the viewer's emotions, but the overall flash because of the mood swapping would be most enjoyed by someone who was fairly emotionally detached. The mix plain didn't work. Either go one way or the other (or go from one to the other), but don't just slap them together. It doesn't work.

Not particularly good...

When I watch this, I have a hard time not seeing it as further evidence that some people just plain do not know how to draw guns (or people holding them). Yeah... Just generally uninspiring. Had some bits of good animation there, but yeah... okay, I'm really scratching to find good things to say about this...

Didn't really appeal to me...

Let's start off by saying that this was not the song's fault. I don't mind that song at all.

I will admit that I'm not a sonic fan. However, it still seemed kind of jarring when you try to put a love story into a blob of pixels. Most of the emotion struck me as kind of... over the top, I guess. I'm not saying that emotional sequences can't be done in sprite movies, but it wasn't done well here, in my opinion. But then again, emotion isn't the easiest thing to show in a sprite movie.

Animation couldn't really be faulted, it was quite smooth. Although, I also admit I didn't like the way that the surprised/hurt animation was used even while they were lying on the ground. Although, perhaps you didn't have any choice in that regard. I don't know.