There is little on the home page for search engines to read..... see here.
So, you should think about changing your menu to a text based CSS menu or at least add Alt image tags to the menu images. And adding some content on your home page.
While the menu item is shown with a green highlight when you go to the page, it would be nice to have a mouse over effect on the menu. It is a little more user friendly - shows users where they are (where their mouse is) on the web page.
Great idea, cool site, and certainly visually explanatory. Roland`s
points cover most of what you can do to make it more "searchable," but
other than that, it comes down to the hard grind now of getting out
there and visible. :-)