The objective of the game is to clear a rectangular board containing hidden mines without detonating any of them, with help from clues about the number of neighboring mines in each field. There are three types of mines, the small is equivalent to one, the medium is equivalent to two, and the large is equivalent to three. To mark a certain block as mine, just tap and hold until you feel a vibration, continue to hold if you want to select a different mine type. It's possible to zoom in or out