Hit purple arrow, then the number 3. On the screen there will be menus for "EQLIB", "COLIB", "MES", and "UTILS". Select "UTILS". On the left of the screen you will then see "MINE". Select Mine and enjoy. Use the arrows to go up down left right or 2,4,6,8 to perform the same functions. The goal is to get from the upper left hand corner to the lower right corner. You can get a maximum score of 108 if you find all of the mines and reach the bottom right corner safely.