SpaceVikingX is another SpaceViking writed with cocos2d-x "learning cocos2d",this book write the game with name "SpaceViking" ,it wirted in cocos2d-phone 0.99, author website: http://www.raywenderlich.com, this book code: http://cocos2dbook.com/cocos2d/sourcecode/; SpaceVikingX is writed with cocos2d-x 2.0.2; it is not complete. I am doing it.