That's pretty neat. ^^ I like the idea, it's kewl. There are some stuff that could be better though. First of all the storm does not blend so well with the background. As Shamino says, the transition is kinda sudden. It's also kinda hard to get a good look at everything together since it's so big. I had to scroll pretty much. :P A good trick to make something that looks half good better is to make it smaller. You could always try to scale down the whole image a little. Anyways, I like how you got so much action into this piece. The sky is full of crazy shiat, that's good! ;) I think the stars should be more white, right now they look a bit like sparkles or something. But maybe that was the idea? :P
I like the colors for this one. Red is actually kinda brave since it's IMO the hardest color to work with in space art. The easiet must be blue. x)
Anyways, you are getting better! Keep it up. B)