Hmm...
I found the series to be awesome so far (even though I haven't watched the first two parts yet), but the reason why I gave you an 8/10 is, just like Edoneh had stated, the white choppy borders kind of DO take away the flash's overall feeling. That, and I noticed that in one part of this movie, you kind of forgot to include some leg movement when two of the main characters were running away from the murderer (unless you did that on purpose).
Also, I might want to make a suggestion for the next episode (or any other upcoming episodes in particular): you should probably include some voice acting in these movies, mostly because I believe that it's the best way for the characters to express their feelings towards one another. But the other sound effects, as well as the background music, I DID find most fitting.
But despite all that, great job on this movie! =)