The game is great and motivating. It's really fun. As Holger has already delivered a very good description, I would like to briefly draw attention to data protection. I understand once again why not a game of marbles, for example requires the Telefontatus and ID. (The location provider, I take that back) otherwise the balls fall out of the picture? Also want the app access to personal data (storage and network communication). What for? I think that as always unjustified. Even if it is a good game. Sounding out I let myself hate ...