This is one of the trippiest things I've seen in a while. The music is great (as expected), and the 3D rendered environment is completely navigable and customizable. There's even a bit of a narrative in the experience that you can follow, but honestly the visual effects are so engaging that it could have as much narrative as a Blue's Clues episode and you'd still be enthralled. Dragging the mouse around the experience not only shifts perspective but creates all sorts of cool stuff in real-time, while watching.
I'm literally painting with geometry. I'm painting with shader effects.
New animals spawn, grass grows on the sides of buildings, a swath of rippling black cuts across a landscape (yet devoid of sinister intent). Amazing. You can even go into the back-end of the experience and customize the various models, including building your own. It's, once again, all open source!
More details in the near future.