This is just gravity slapped onto a parallax background, I was curious whether the effect would look nice. It's a bit jittery, but that's really just a problem with scratch, go to forkphorus to see it in a much more pretty way. It ended up looking a lot like that thing griffpatch made, which I would attribute to convergent evolution essentially, specifically the problems faced in making space things accurate but easy enough to play with. Mine's a little more accurate, in that you can accelerate to infinite speeds both transationally and rotationally, (or at least until you hit double's rounding errors), but I suspect that was a conscious decision by griffpatch to make his easier to use.