Nintendo just Tweeted out some more details of their upcoming free to play mobile game, Dr. Mario World that's coming to Android and iOS July 10th! It looks like a modern take on the classic gameplay made to work well for phones. Since it's free to play, it will be a day one thing I'll play. That said, the gameplay in the video looks fairly slow paced and its not obvious that the "upside down" gameplay of sorts will be fun. Makes sense they are doing it that way with touch controls but it looks like something I'll have to try to know for sure. For me, Dr. Mario is one of the best puzzle games somewhat in same league as Tetris so they have some of that to live up to.