Can't see shit, cap'n.
Seriously, shit's flying everywhere nonstop. First of all it doesn't run smoothly because the screen NEVER stops moving. At times it's like "wait wtf just happened," and there were a couple of scenes in there where I swear to god you just made the screen do a 900° spin for no apparent reason. Calm down with the screen movement. Maybe that would work if you had better technology, but with a Flash cartoon it basically just makes people think "wtf you're serious?"
Second thing is, it's extremely repetitive. I literally thought I might be watching a ytmnd flash loop about half way through. One side shoots an energy ball, the screen follows the energy ball to the opponent, the opponent recovers and fires an energy ball to the first guy, the screen follows the energy ball to the first guy, the first guy recovers and fires an energy ball. Rinse and repeat. The thing is, energy balls are fantasy. The reason that, say, a stick figure fighting flash can do well and yours can't, is because when a stick fight flash shows a guy getting hit, people can relate to how bad it'd hurt, or how hard it'd be to throw such a punch. With yours, no one thinks "Oooooh snap man. That guy just got hit with a blue energy ball! Everyone knows those are the worst!" We think "...so is that like...powerful? :U" The whole energy ball idea is nothing more than a failed attempt to look godly-powerful, really.
My advice is to stop trying to be so over-the-top dramatic, cause it's not working, in my opinion.