Thank you. I admit that the game takes time to learn. The best way to get into it is to begin with simple solutions: 4 and 2 cards; 7*6; 10*4+2... Then take the time to look for more subtle calculations. The game is about experimentation. Finally, challenge a friend in the two player mode only when you feel ready. I'm thinking about a calculator application for the game. This would probably make the mechanics easier to understand.
