-I'd be getting rid of the text, or sticking it at the bottom.
-Adding a nice thick white border to the whole image.
-Blending the moon / planet in a little better ( and why's half a moon over the housee!! Shrink it down and stick it on the left! A buildup of minor details looks better than a buildup of loads and loads of ideas at once!! )
-Maybe sharpening up the stock image of the manor, or even adding to it to make a more dramatic setting, we are in the clouds after all!
-If you have the ability to place the abstract stuff in amongst the clouds between her and the house ( use of perspective , lighting on the clouds ) popping in and out, it would look awesome. That's about the only way I can see it in this image effectively though!

I seem to have written a bit of an essay, sorry! It's a well executed piece, just a little more thought into the composition would have it looking nice and refined, or proffessional!