When you press the flag, the cards will scramble. Click on the cards and try to get all the pairs! When you click two cards and they are not the same, it will flip back. When the cards are the same, the cards will disappear, indicating that you have found a pair. *Please read* Do not spam click all the cards, please just click 2 at a time.
I used a broadcast "start game" when the play button was clicked. I also used a lot of "when this sprite clicked" blocks to make the cards/buttons do what they are supposed to.