The animation is pretty good, and I especially enjoy the effects that were in the very beginning of the video. It would have been really cool to see effects like that for the whole animation, but the ones in the fight were still well done.
Also, the fight could have used some other sound effects in addition to the music. It was also pretty awkward when the music cut away to have the kid scream. Audio can be tricky to balance, but you can have both your music track and sound effects in a way that doesn't make either of them overpower the other.