Simply press the eye icon only when you see the same square turn red that did 2 turns ago, for level 2. For level 3, press the eye icon only when it's the same square that turned red 3 turns ago, and so on.

At the same time, press the sound icon only when you hear the same letter that you heard 2 turns ago, for level 2. For level 3, press the sound icon only when you hear the same letter you heard 3 turns ago, and so on.

Memo is the only brain game with research indicating that getting better at this task will make you better at other cognitive tasks unrelated to it.

You choose your own level. You choose how many turns per game. You can get immediate feedback on each turn.