Twins Cards for Mac

From Danlabgames:

Object of the Game: To find all the matching pairs of cards. How to Play: Twins Cards is a rather simple memory game. Above are cards which begin face down. Click on one to turn it over. Try to find the second card that matches the first. If the second does not match, both cards return to a face down position. If the two cards are identical you can keep them and turn over two new cards. You win the game when you have matched all of the pairs and all the cards are gone.