It took me quite a while to figure out, but it doesnt bother me now cause i realized that its true that the longer you take to solve this puzzle, the 'smarter' you are, if you should use that word.
Because people that are 'smarter' think big, and seek logic, so try to find a answer way further then it actually is. People that never think that far or cant find logic so far, look more to what they actually see, and find it fairly easy then.
I did try to find a logic answer with the numbers and even the colors that maybe meant something on the site, yet it was right under my nose