Cool
This appeared to be your generic 'beat-em-up' at first, but it turned out to be much more innovative than I expected.
The animation was satisfactory (excellent at times, but rather poor at others). The content was very ambitious, so I still give it a big thumbs up overall, but the walk/run cycles in particular were too choppy for my taste. Then again, I also noticed a ton of FBF, which is always a bonus in my book.
Conceptually, it was simple yet quite brilliant. The idea of defending the defenseless white ball gave the flash much more of a purpose. I think if you had just made this an all-out brawl, you would have sacrificed a great deal of originality and entertainment.
The soundtrack was very fitting. Great choice.
I thought the ending was excellent. It was unexpected and actually a bit funny too. So overall, I thought this flash had a great plot that was accompanied by an outstanding effort. Nice job, man.