Rules: You can check the number of neighbor mines by left click on squares of the field (not the crosses!). If you wish to place a flag instead or withdraw the flag, click on the gray framed icon below the field. The icon inside red frame indicates the current action done when you click on the squares. The game continues until you can discover the whole safe area of the field or fail due to the selection of a hidden mine. Game levels (difficulty) differ in the number of mines.