Good work on this. Sounds almost like something that should be arranged for a marching band to play in regards to the content.
I like the realism you put into the voicings of the instruments- most people would probably just load up a staccato patch and gogogo! You clearly put a bit more effort into making things sound as clean as possible.
Your pizzicato cellos seem a bit close in the mix. Consider adding more reverb/a reverb with a larger impulse and make them a little quieter- that would give a feeling of distance.
Keep compos(ed/ing)!
-Samulis