Points and time bonus:
If a set of cards was found one obtains a time bonus and points, the amount of this bonus depends on how many times a card has been flipped. One card has a maximum of 5 sec and 50 points, a set consists of two cards, thus a maximum of 100 points and 10 seconds can be obtained from a deck. Every time a card is rotated back will be deducted from this bonus 5 points and 1 second.
A Lucky Strike has then conceded when one finds a Kartenstet the first attempt. If LuchyStrike obtained an additional point bonus of 100 points
Highscore leaderboards and achievements:
In Chang Memory are leaderboards and achivements supported by Google. If you sign up with a Google account then you can compare who is the best of friends, or whether you belong to the world top.