That one image is basically all there is to it (there are also different zoomed out versions but those don't have HD graphics yet). It's just a physics/graphics demo at this point.
Looks good, though I was getting choppy-ass framerates, but my laptop has really crappy graphics and I'm forcing it to output at a much higher res than I should be.
I'm wondering if they're going to in-between new animation frames. I feel they really should, to fit with such hi-res graphics.