Memory is a mind game. You must remember where the pictures are and find the pairs.
Traditionally, Memory is a solitary game. But on keyja.com, it's a 2-players game. Each player plays after the other until the grid is full.
In order to play, just click the cells. It's simple to play, the rules are simple, but the game is far from simple! Try it and you will have fun.
Remember you can set the clock parameters in the game options.