Improve my users experience

Responsive 960 Grid Web Mockup

Hello sir, This is my design. I create it with photoshop and all is layered element and the layer is grouped for easy to customize. Please give some feedback on what you like and what you don't like. I will update my design as what you want later. The design i have create is homepage, download page, documentation page and documentation inner page. Hope you like it and thanks. Regards, Junaidiey