To use the flag feature, press and hold on the specific square you want it on to set or unset a flag. The flag is used for where you think there is a mine and the mine locations will be revealed when you win, or blow up. If the minefield is larger than the screen, you scroll. This has 3 preset game modes Beginner - 9x9 field with 10 mines Intermediate - 16x16 field with 40 mines Expert - 30x30 field with 99 mines Then there is a custom mode where you can have a minimum of a 5x5 field with 5 mines all the way up to a 60x60 field with 1200 mines!
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