CLACK! Thwack! uses gameplay similar to CLACK!, but with cards replacing the magnetic discs and with each player bearing a suction-cup thwacker that they will use to claim cards.
In the game, you must thwack all the cards in play that match the dice combination rolled. Cards each show three objects on them, with those objects being red, green, or blue in color and an animal, tree, or vehicle in type. If you roll "0 - red", then you slap all the cards that have zero red objects on them; if you roll "2 - animal", then you slap all the cards with exactly two animals on them. If you're correct, you claim the cards, then refill the display to seven cards.
If no cards on display match the die roll, grab the "NO MATCH" tile in the center of the player area. If you're correct, you collect all seven cards; if not, you must give a previously collected card to each other player at the table.
When all the cards have been claimed, whoever has collected the most cards wins.