Intense
The best flash action vid ever submitted. The violence is brutal and unrelentless, but you resisted the temptation to revolve it around the main heroine and instead we get a fantastic impression of something much larger at stake. They are not all fighting her, its a royale rumble, with great graphics AND coreography, which is rare in itself.
Probably the best thing I can think of is very subtle, that when we first see the city its obviously a war zone, and as we enter I was expecting you to either cheat or just get it wrong by the whole scene being all quite like a ghost town, for the heroine to stroll through and really just observer the violence, or for all of it for some reason to come towards her, imagine my suprize when the balence seemed perfect.
With all this I can only think of one future suggestion, when it slows down and she's talking with someone or in a "safe" location, just remember everyone else is still fighting, and not holding a minute silence just for her.