The theme is so cool!

Epic piece (on more than just one level)...

 Dithering! Why didn't I think of that? :( I even used it in the clouds themselves.

Really nice! My only crit would be to say that it would of been nice to have the top of the clouds dither blend more into the deepest purple.

COB for the win =)

pretty nice work

 Awwwwww... It's just... awesome )

 Congrats, very nice work. :)

 How could I miss this? This is AMAZING!

Rate rate!  

 Godlike. :0

Looks mighty fine.

I really like this, good work! ;)

 Really interesting...

Beautiful.

Beautiful.

 Amazing.

BEAUTIFUL!!!

Good work dude!) 

Lovely.

I think you could perhaps work on the AA a bit more though.