Job well done
First I just want to say congratulation on your daily third place, and you've done a good job with your flash movie :) The setting, the music and the mood everything blended very well together.
If you don't mind here's a few tips.
I strongly suggest you studying a bit anatomy that will make your art look a whole lot better.(even if its animu)
Also perhaps trying to make the story a bit clearer. It was alright with the text in the beginning and all but once the movie started playing I was rather confused about who was who. What did the scene where he was surrounded had to do with the story really? and Why were his brother in a tube?
Overall, the animation was good, the setting and music fit perfectly together you had a good story however it was kinda random.
Looking forward to your next work ;)