I know the rocks need work............what else? ::)
Not much :)
I don't know the others but a little more contrast , just a slight crop from above
and different fake stones would do it pretty much, for me at least Yossam.
I think you should put the sun about a third from the left, but greatly reduce its power (to 1 or less). Then add a copy with full power, but disable its glow and specularity. See what happens....
Another...................still adjusting.
great job!
Nice. I liked it better without the helmet though.