This simple game will train your memory and attentiveness in an easy and funny way. All you have to do is find all pairs of numbers starting with 0.
E.g. first you search for 0 and another 0, then 1 and the second 1 and so on. The numbers have different sizes which makes it even more fun!
There are four levels that differ in number of pairs you are to find: 20, 30, 40, or 50. The game will remember your best times for each level.