Squares light up, then vanish. Tap the ones that lit up — in any order. One more square every level.
Most people stop around level 6
A pattern of squares lights up on the grid for about a second, then disappears. Tap the squares that were lit — the order does not matter. Clear the level and the next one adds another square, with the grid itself growing every few levels.
You get three lives, and a failed level can be retried. Most people stop somewhere between levels four and eight. The reliable trick is to stop counting squares and start seeing the shape they make: one outline is a single thing to remember, where six positions are six.
A pattern of squares lights up on a grid for about a second, then disappears. You tap the squares that lit up, in any order you like. Clear the level and the next one adds another square.
Most people stop somewhere between levels 4 and 8. Reaching level 9 is sharp, and past 12 is genuinely rare.
Order. The chimp test makes you tap numbers in sequence, so it tests memory for order as well as position. Here only the positions matter, which is a surprisingly different skill.
Look at the shape the squares make rather than the individual squares. Most people who do well describe remembering a single outline rather than a list of positions.
More to play: Chimp Test, Number Memory Test, or all solo games.