I'd give you a 4.5 if it went like that
This was a high quality animation. Your characters were very interesting and it seemed like they actually had lives and stories to tell. Your graphics, in my opinion, were the best part of the flash. The drawings were very nice and the anime theme went well with the story.
The only thing I didn't like about the fight scenes was how it didn't really show the actual contact or blocks- it seems like you were focusing on how powerful they were and not how they used it.
The sounds were a little off as well, like when one of your characters threw the sword at the female demon's face, it made a male grunt sound. You might want to expand your repitoir of sounds for future animations and coordinate them a little more.
Otherwise, this was a really nice animation.