N-back
A square lights up step by step. Tap Match whenever it's in the same place as N steps back. Get 80 % right and N goes up.
1-back: compare each square with the one 1 step earlier.
A square lights up step by step. Tap Match whenever it's in the same place as N steps back. Get 80 % right and N goes up.
1-back: compare each square with the one 1 step earlier.