I love the painterly quality of the clouds, but they don't seem to gel with the foreground of the picture - things are too sharp and 3d there, in contrast to the clouds. Don't know how to get round that. Re scale, the tree in the background is dominating the scale, shrinking everything down, ditto for the weeds. Maybe if you added a tiny doorway to one of the structures, with a path/road leading to it, or if the roads are supposed to be buried under drifting sand (?) maybe a grand stairway leading up to a doorway tjat's a bit above the ground? Good suggestion in previous post, add a tree in the foreground to give a sense of scale.