I just managed to crash it doing that: accidentally dragged myself too far away from the 'world' and now the ball is just sitting in the middle of the screen, spinning.

Thinking about it, maybe I've just put myself in orbit :-) It's a bit difficult to see where down is, though, to get myself out.

Hah, figured it out: you can tell where down is by drawing stuff and watching it fall.

More fun: draw a spaceship around yourself and drag that around.

From what I could see, it's not really a game exactly. It's more of an explore the area/play with objects kind of thing.