WaxStefano 96, you should add some pictures to your map. I am sure your map looks good but, if people can't see what it looks like you won't get very many downloads. You can use theater mode to take some screenshots.
Based on the pictures, I think you could recolor the pieces for great effect. You could also make them shiny.
I agree with Ryouji, needs more color. It looks like you just slapped the pieces down without any thought on their color. Also, maybe touch up some of the structures and make them look a little more... I don't know, man-made, not so, just thrown together. EDIT: Re-reading this, I realize how much of a D it makes me sound. Not intentional.