Pretty clean almost minimal layout. Nice color choices and I like the double dots used for the section icons. I’m most intrigued by the interactions on the main 4 squares/buttons. The movement and shifting background image makes the site have something that stands out. It’s fast and the interaction feels smooth. I do think it should do something ‘on-click’ though, I don’t necessarily feel rewarded as a user when all I get is the headline text/copy. A good little reward would be some extra copy or linking me up to a full page on the subject identified in the button area maybe? As interesting as it is on the home page the place that I really like it is on the sub pages, with the page title mostly covered up it jumps a little as you mouse near it.
I really like it design wise. But it kind of annoys me that when I click on any of these four boxes at the top of the home page nothing happens, although it clearly indicates that these are links that one can click. Very counter intuitive. And even if these boxes aren’t actually supposed to have any action attached to them then the entire purpose of the scrolling background isn’t quite clear to me as it doesn’t add anything information wise (except meaningless catch phrases). And if it’s only for the effect they could have saved the entire thing in the first place.
I expect, for example, a detail page for each box that explains the features a little more and maybe lists references. Then you can also use some effect to enhance the experience. But just effect without meaning? Useless.