I enjoyed the progression from a warmer color to a cold atmosphere - feels like you know the enemy is on its way! You have a very good choice of instrumentation and samples here. Love the Asian percussion here. I would love to know all the instruments you used in the song, as I'm really a sucker for exotic sounds and rhythms. You have a good way of tying every movement together, nothing feels muddy or forced, and the choice to bring in strings around 1:47 was a good idea to let the listener know it's getting intense!
Criticism I have:
The flute/pipe in the beginning doesn't take a moment to breathe. The musician would pass out from playing all that in a breath! :)
The pitch bending is a little off-putting, to be honest. But I do like how you took the experiment here to another level - pitch-bending can be risky with samples. Did you use a wheel to bend it?
The percussion seems to arrive slightly sooner than the melody. Not sure if this was intended, but it makes my OCD flare up. :P
Truly though, an enjoyable piece. This is one I'm listening to to get my serious study on for a final! :D