Mem follows the idea and rules of the board game Memory. Forty cards are randomly placed on a rectangular grid of size 5x8. Each symbol is included in the cards twice. The goal is to find as many pairs of symbols as possible. On each turn, a player can turn over two symbols and, if they do not match, turn them face down again.
The game is single-player, with the challenge being to solve the board in as few tries as possible. There is no multiplayer mode and no computer opponent to fight against. Matches found do not disappear, but remain visible on the field. If a board is cleared, the score is displayed and you can start again.