I like this, my only criticisms i think have already been said, just that the transitions between the different sections are a bit mechanical and abrupt. I'm also not a fan of the piano glissandos, they're just a bit too clichéd for my liking, if that's the right way of putting it. Maybe you could throw in some of your orginal fills at these parts? Just on a personal preference here, but i'd like to hear the melody shared across other instruments more (a bit like you did at 0:15) to give the piece more interest and variation. Again that's just personal preference though.
Anyway keep up the good work!