As always, amazing work, though I'm a little confused. The layering in the back with the structures, the bits of in the distance(correct me if I'm wrong about that) mesh too much with the shadows for me to be able to see that they're behind the things with a mostly-solid outline. If I’m completely wrong, sorry for wasting your time.
No no don't worry ! thanks for your criticism, I like getting feedback. You are right, I've really worked on this one for a very little time and I forgot some details. It's hard not forgetting everything in less than 50 min hehe