Great!
You have great realism in your pieces. What software do you use? I have yet to get the hang of producing orchestral sounds in this manner. Great job!
What I would've liked to hear was for it to go from the ballad into a fast march. The Defcon Zero melody would sound awesome in a film-score-style orchestral march. Have you heard 'Fountain of Dreams' from Super Smash Bros. Melee? That's sort of what I'm talking about. It starts out with a ballad intro, and then goes into a Russian-style march with the main Kirby melody. Something like that would've been really cool for this piece.
But that's just a preference thing. You get no less points from me for that. 10/10, 5/5. Awesome work.