Cool! Some notes:
Try to be more clear about whats clickable and not.
I think you could go a little bit more easy on the green. Like on the navigation, try to remove the hover underline, and use green icon only on the active page, and maybe a light grey on the inactive ones. http://www.dropbox.com/s/zhjcr9j39y335az/Screenshot%202014-11-29%2022.51.09.png?dl=0
And try to add some more space between your text blocks here: