The intro was very cool, but then the rumbling bass kind of ruined it for me. Maybe turn it down a little bit, seriously. The rest that came in was also pretty cool. I'm really getting down to this. At the 1:13 mark when everything starts getting a lot heavier, the crash cymbals are too much. I recommend putting a chord-synth in and turning down those crashes, then maybe extending it out more, because the payoff shouldn't end so abruptly, in my opinion. There's probably more stuff I could tell you, but overall, I got down to it. Nice job. Make it longer! =)

Kaeo