Hi all.
Recently, our company has been developing an engine built on top of Cocos2d-x, if you have any suggestion regarding the license please let me know. The engine is very dynamic and can be tweaked to different styles and gameplays, which is pretty good. Right now, the facebook integration is being implemented.
Performance for TiledMaps and physics will be improved as soon as possible. I believe that some of the slowdowns are related to the usage of strings in variables, natively, that can be improved by moving the kinematic bodies to C++ classes and objects, which will be done after core performance using Lua is achieved.
Everything is delivered here:
Have fun.