If programming is not an issue then I would recommend libgdx (java) or cocos2d-x (c++). Both of them are open source, free and have relatively small learning curves, specially libgdx.
If programming is not an issue then I would recommend libgdx (java) or cocos2d-x (c++). Both of them are open source, free and have relatively small learning curves, specially libgdx.