This is a beautiful song. My only suggestion is that it seems a little repetitive - a piano solo, or maybe just some differentiation would make this perfect.
I'm certainly not docking you on score for this, but what in GODS name is this doing under dubstep? When I listen to dubstep I usually expect the bassline to rip me to pieces. This is closer to *ambient* than dubstep. :D
(Not trying to be a jerk, just genuinely curious.)