Cheers tme

I acquired the sources to PocketPhysics on the DS from the author who was more than happy to share. Unfortunately I haven't had time to do anything useful with them (i.e. strip the DS specific code.) Now I know I won't need to add this to my list of projects ;D

I've not tried tme's numptyphysics yet - but if the physics simulation is slow and assuming you've not used it yet - there's a fixed math implementation of the Box2D library available that may make simulation faster.