To score in Purrfect, you must collect all nine poses of the same cat...while imitating a cat at the same time.
To prepare, choose one set of nine cat cards for each player, shuffle them into a single deck, then deal each player a hand of nine cards. Lay out cards showing the numbers 1-4, then place a random "meow" card next to each number from the deck of 29 cards, such as "miyu" or "mrraoo".
Playing simultaneously without turns, players can propose trading cards with one another by making the sound of the number of cards they want to trade. All cards in a single trade must be of the same cat. (Cats are identified by color, name, and an indexed letter.) If someone else meows the same way, you each place face down the appropriate number of cards, swap them, then place the new cards in your hand.
As soon as a player has all nine cards for a single cat in hand, they win the round, earning two pawprint tokens. Among the remaining players, whoever has the most cards of one cat wins one pawprint. Play multiple rounds until someone collects at least five pawprints and wins.