how is naive and simple engine? people behind are SDL guy, and another person that did make successful games on apple. it has a lot of features that other engi

how is naive and simple engine? people behind are SDL guy, and another person that did make successful games on apple. it has a lot of features that other engines, have. so what do I miss here? does cocos2d is so advanced and better than dragon ruby to build a 2d game?