Interesting site, but I really cannot understand why the mouse click is a "bad" thing. Having pages do nothing unless you explicitly click is a great thing, that site showed me exactly how annoying it can be to control an interface that wants to rearrange itself all the time based on mouse movements. Moving the mouse to a link and having the link move AWAY because you happened to move across one of the links between…
Sorry, but I think you have to go a few steps further if you really want to seamlessly eliminate the click (which begs the question: why?).
The UI was annoying - the same UI that I've run into for the new Sims game - an over-reliance on mouse-over events, popping menus in and out of existence based on minute, often accidental motion. You have no idea how hard it is to, say, buy a bed and choose the wood finish for your Sim, just because the UI sucks.