More changes, sound and composition
It sounds kind of bleak for the first minute when it follows that progression and has the repetitive melody going. If it had vocals or a sort of lead instrument, it would justify repeating so much. This sounds more like it would belong in the background of a rock song instead of a straight solo piano piece, and doesn't really merit a lot for listening value.
Also, it sounds like you're using Edirol's piano? That can be a beautiful piano sound if you just change up a bunch of velocities. Right now it just sounds like everything's at one level, and when everything is peaking, it reminds me of a Dragonforce song. Also, the ideas in this seem separated from each other, and it makes it kind of sound like a sandbox at the transitions.
I'd delve into jazz and classical if you were really wanting to create really beautiful and unique pieces!