thats sick lucid
you use sprite z placment/distort im guessing right.
the physics dont account for 3d movements do they? i dont really see how u could do that, but other than that, its really awesome, i love flying in and out of the screen.
i dont really see the need for physics tho, its making it look jellyish. a follower script like i usen in evOlution would prolly look better, and you could probably tweak its movement over the z plane by making the segments virtual spheres