Hey! Welcome :D This tests your ability to tell colors apart! Just click the green flag, and when the green squares pop up click the darker one. then it will give you a new grid with a harder to see dark square. as the levels progress the darker square will slowly become the color of the lighter squares, and therefore more difficult. at round 50 its the same color and its basically a 1/9 chance from then on. lol. a very few percentage of people have an unfair advantage as they have an eye "disorder" where they see like 100x the colors as us! so ya have fun. i got 44
This is for the 10 squared thing. also it looks like the shade of the square doesn't change, but it does your awesome brain fills in the gaps and tells you that the square is the same as the last but after a while the shade is so far off from the original it stresses out your brain so it accepts it as the new shade and continues from there. also since the new shade is closer to the other 8 squares the brain gets stressed out more easily and accepts the new shade faster. so ya. have fun.
