I like the progression and harmonic elements. The sound design is a different story. That main pad sounds a bit harsh in my ears, and the synth that comes in at :15 sounds pretty generic. I also think the hats could be a bit louder, and that the transition at 1:04 could've been a lot smoother. Even a simple crash probably would've sufficed. I do like the warmer pads that come in at 1:20, though. Adds a pretty tasteful sense of resolution to the piece. It goes without saying that you could've done a lot more with this piece, but for 30 minutes you've done some pretty solid work. Keep at it, man! ;)