Press E to switch between the "Clear" tool and the "Flag" tool. Minesweeper is a game released in the late 1980s, and it was a simple game that was designed to run on early, less powerful computers. The numbers on the screen represent how many adjacent tiles are land mines. For example, uncovering a 2 means there are 2 mines next to it. Uncovering a mine means you lose! 8 mines are scattered across the board, and your job is to find all of the mines and "flag" them. Each mine is represented with an exclamation mark. (!) The number of mines left is the number at the bottom left. Click the green flag to restart, and click a tile with the clear tool to erase a tile.