I like all the colours, particularly the highlights on the rocks and the way the lighting on the clouds is well focused, although I think the top of the rock pointing up the way it does is a little odd maybe. Also, you'd save a lot of colours just using a dither in the sky to make between colours appear c:
Please use the 'edit it' to upload a version not scaled up and hit submit again.
Its cool to scale up a little but here its overdone and takes away from the image.