At first this website is a little hard to figure out because what they are wanting you to do nav wise is very unconventional and odd. But once you figure it out, it’s pretty smooth, responsive and neat—perhaps a little too novel.
I like the main nav in the homepage because it’s a rotating cube with all the pages on each side. You can rotate this cube in 3d and choose the page you want. However that said, it is again, unconventional and odd. Fun, but odd.