Short piece for a Scifi/Time Travel trailer

Hey all, this is actually my first post, I'm sure there'll be lots more to come since going in to a job has made me increasingly desperate to search for any opportunity to spend my time on music and with musicians. This is a short science fiction movie trailer piece I wrote when I was in school. I had a lot of ideas at the time but far less definition than I do now, so if you could give any explanations as to what makes certain parts of the piece work, particularly where dissonance is concerned, and how to make other parts better, I'd be really grateful. Thanks! (oh and headphone warning, I'm not sure whether I mixed this thing back when I exported it so the very start might make you jump, other than that it should be fine)

Very unique. I am able to gather many different colorful images as I listen to it. When the organ or electric piano come in, it sounded a bit unexpected but wasn't too much out of place. This piece seems to have many types of ideas meld into one, instead of sounding like one whole coherent piece. 

What this piece does though is keep me interested. I love your percussion work, especially your drums at the end.

Good job.