I hate tilting my head 90 degrees clockwise to read something.

Further more, the style of the tabs are out of place, in my humble opinion --- Make them hanging from some horizontal bar or something.

The icons are not that obvious in their functions, so you should probably put some text next to them to say what they do or where they lead to.

The design is pretty simple.

The structure of the layout is coded using HTML tables. Your friend should use CSS.

But, glad you finally get your website up.