Only fast thinking and observation will get you through this game. All you have to do is look at each card and see if the next card matches the one before!
You have 45 seconds on the clock - how many cards can you get right? Remember every card and see if the next card matches the card before; then remember the card you just looked at and see if the next card matches that one and this goes on till the timer shows 0. Level up and test yourself to see how many cards you can get right!