Find the different color, go through higher levels!
Start with 4, continue with 8 and 16 dots!
As the difficulty level increases your eyes will squint!
It is also a suitable game for testing color blindness, there are slight differences between colors and you have to find the different one.
It is a great game just like 1010 and 2048.
You will forget the concept of time while trying to find the different color!