Pure work of genius
Out of all the Flash animations I have seen, this has got to be one of the most unique in presentation. Rather than showing everything that happened, you portrayed them symbolically. For example, rather than having the main character tell us about the horrors of his comrades being slain, you represented the horror using faint pictures and agonizing moans. That gasp and facial expression during the fight against the centaur speaks much more than if he said "I don't want to fight you, my darling!" A definite 10 in style for such a great presentation.
The graphics were, unfortunately, somewhat average. Although I understand how difficult it is to portray dynamic animation using more tweens than frame-by-frame, it made the posts seem static. Nonetheless, the graphics were better than many flash movies on NG, and the movie gets a solid 9 there.
It might be a little better if you improved the voice acting a bit, since they sometimes sound bland and emotionless (especially the moans during the flashback). The music was used really well, but the average voice acting lowered the "Score" score to a seven.
I don't think I really need to explain my other ratings. Either way, due to the presentation alone, this flash animation is a work of genius. I certainly will look forward to more animations from you in the future.
Good luck :).