In the Solo games, where you are playing Cards Match Game against yourself, you get the option to get three stats: the timer, number of moves, and how many “oops” you have.
Timer: try to match each pair of cards with the fastest speed.
# of Moves: try to match each pair of cards with the lowest number of moves.
# of Oops: try to get the lowest number of oops, i.e. try not to miss any matches that you should get because you have already flipped over the matching pair of cards.
You can compare your performance between the games you play on your Playcard if you are logged in when playing the game. And you can also check out the high scores on the Top Scores page! Have fun!