Hello.
I don't believe Halo and Anime go together well at all. The voice acting s honestly quite weak... I don't like how the models outside of the anime look obviously traced or just too dam close to the original stuff. the contrast of the visual style of everything except for the actual people inside the suits doesn't honestly work too well. And making the characters inside totally un-bad-ass japanese teenagers is kind of not working. the animation itself, like the motions and such is pretty weak and uninteresting. they almost seem humorous when they are running. the lack of animation in some of the tense moments, those typical slide show style displays of the characters standing next to each other while something intense is going on but they somehow don't seem to flinch about it kills that climactic moment at the end.
i know i'm sounding like a total hard ass, obviously, but it just seems like you do have he talent to pull it off but you just don't quite get there. it looks like you just need to put more time into the right places. this is just an honest review, i don't mean to say all those negative pointers just to be a prick. i'm just saying that its kind of interesting making some sort of series like this, kind of how star wars is making its own tv show. so you got some potential material, just needs a good lot more of work.
keep it up, and just keep thinking about improving and improving your work one right after the other.
;)