Yeah been playing it about an hour. My thumb hurts, lol.
I was expecting it to cost money but it was free. I haven't played anything except the main story mode so far so I don't know where the in-app purchases will come into play.
I played it some today and have mixed feelings about it. In my opinion the game does too much for you, even for a runner. I don't like that Mario automatically hurdles enemies and pipes. I think that should be 100% manual control. I also don't like that you cant go backwards. I know they made such a big deal about being able to play this game with one hand but I would've preferred more direct control over the character.
I beat the first world in like 5 minutes and there are only 6 worlds. Not worth the money for the rest.