The action was good, but the music felt off from the tone of the fight. I feel that something less pop-ish would work better. I also think the blue character shouldn't have had anime eyes, because it contrasted the aesthetic of the art. Perhaps simple dots for pupils or colored in circles, but the highlights and the size of the iris and pupil were more in line with the "moe" style rather than the action portrayed in the video. I also think that while the characters don't need to be super defined, what story there was felt ham-fisted and had no real impact. I'm not saying to make a while convoluted backstory or anything, but make WHY they fight more than "Oh, burned my athletic tape, better kill him." Re-contextualizing the conflict would make things feel less amateur.
On the positive side, the fight choreography and the lighting effects were amazing. I think if you keep working at it, you'll really have something.