First off, your pictures are always a treat, no matter what. I love how you captured the motion of the little guy bounding through the air.

I, personally, think it has everything to do with the background, and how it seemingly drops off. The right side, not so much, but the left it looks like you laid-down a base-layer of that aqua-greenish colour and planned on doing something with it but just forgot. I think the right side looks okay because it's darker and the colours match a little closer so it's less of an impact, but on the left you see this wonderful detail in the grass and leaves but go up a little further and it just becomes like a generic backdrop.

And to pick it down a little further, I think the highlights on the wing-tips for the dragon laying on the ground just look... odd. Now I imagine that it's simply his/her colour-scheme that there is a thin, light outline, but I think if you maybe, on the edges that are closest to the right side of the page, darkened them just a little bit more, it would have looked a little more natural. Maybe you would have to make the dark-coloured portions a little bit darker to accommodate.

Lovely work, Crys. I hope I never see the end of your artwork.