what i am supposed to do with the cards game? just get the number of matches that is highlited on the bottom center sphere?
Also: yes, it's a match-2 game, but you can add a tiny bit of strategy.
In typical match-2, you turn two cards. If they match, great.
If not, they become hidden again: you turn a third card, and if it matches one of the first two (and you remember what position it was), you match right away.
In this game, once you turn a 3rd card and it matches one of the first two, it's preferable to turn the 4th card first, to see what's under there – there's a chance that it's a special card.
Yellow: you can use that to turn all cards at once briefly.
Blue: an extra mana reserve (turning cards cost mana, in this game)
Purple (the one you really want): a free item (chocolate or wine or butterbeer)
So, me, I play the game for the spell, yes, but I also do my shopping at the same time