The numbers reveal how many mines are around that square, including diagonals. Click to reveal. Space to flag. Space again to double flag. Space AGAIN to TRIPLE flag. There are definitely bugs. I am keeping the part about you can flag numbers because funny. Oh, and sorry that the first click isn't always on a 0. BUT 0s automatically clear now! Massive thanks BCMGF1137/19! And to the 2 people that are wondering, I did not actually decide the colors for 9 and above.