From GameBrew - a wiki dedicated to Video Game Homebrew.
MineSweeper is a DS homebrew puzzle game in which you have to find bombs hidden in the mine field, based on the original version from the Windows OS.
All the tiles being pressed without hitting a mine consists a number, which gives you a hint of where the bombs locate. For instance, 1 = a mine is hidden around the tile clicked (1 out of 8), where 2 = two mines, etc.
Stylus - Tap on the squares to un-hide the box
L+Stylus - Mark the box with a flag
Start - Menu
M3 Real (firmware 4.2d)
M3 Simply (firmware 1.14)
DSTT (firmware 1.15)