Not bad. It's missing something, though...
You got the main theme right, but it's missing some of the main percussion from drums, which gives it the pressure feeling like in the OST(, AKA, the original soundtrack). Personally, I think it could use some better drum percussion, such as an actual main beat when it gets to the "chorus," so to speak. But you did something that I don't think anyone ever has done, so I do give you props for doing something that was great, but ignored.
My Ruling
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9/10
4/5
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I'm not trying to bring you down on it; I'm just saying what could make it better, incase you ever do decide to remix it. Infact, I do encourage you to give it another shot; I can even drum for you if necessary. =)