OK,.. haven't used any of them but the samples I've seen look like physics with objects falling etc to me... On 27/02/2013, at 3:12 PM, Colin Holgate wrote: > Yes, hence Box2D or Nape. Cocas2D is just 2D sprites, not physics. -- M E R Goulding Software development services Bespoke application development for vertical markets mergExt - There's an external for that!