The classical game of mines is about stepping on as many tiles as you can without hitting a mine. The more tiles you manage to open the higher the reward. If you step on a mine you lose.
You can select if you want to play a 3x3 or 5x5 matrix. The number of mines can also be selected. Use the cogwheel for changing any of the default settings. When you are ready type in your stake and push the green button to start.