I agree with you on the roofs. I just used the standard RTP desert, so there was nothing I had to work with. What do I do with those, xD.
About the ladder. You must never of used it before, 'cause everyone that uses the RTP knows that you have to make an editing of the ladder. Hehe, make some maps of your own before you comment on mine.
The mountains? I can't see what you mean about them being repetitive. They are supposed to be man-made, if you look harder, you'll see evidence of bricks in the mountains. in the picture comments, I noted the blue square, check it out.
I was to lazy for cosmetic lighting, screen tone, and lighting events. I'm busy with other stuff xD.