I swapped the animation at the top of the Koolmoves home page https://www.koolmoves.com with an animation I created in KoolMoves using a sprite sheet, custom javascript, and Box2d, a physics engine used in a lot of games. The Box2d didn't play well with jQuery requiring a change in the order of the javascript code. I got the idea from a CreateJS/EaselJS example http://sandbox.createjs.com/EaselJS_Box2dWeb/. In a future version, I will integrate the engine into the software.