Motif
Select every card that shares a secret visual property with the others.
Every card has a shape, a count, a color, and a fill style. In each round, some cards secretly share one property in common — the rest don't.
Tap every card you think belongs to the matching group, then submit. You'll get a few attempts per round before moving on.
Rounds get trickier as you go — more cards, more properties to weigh against each other.