A game about counting cats' shapes and colours, that keeps getting trickier.

From BoardGameGeek:

Each turn, someone flips over a card! Card backs show uncoloured cats, or scribbled colours. Fronts show 3 cats, coloured in red or purple. The newly-revealed back tells you what shape(s) or colour to count. First to yell the number and slap the card wins that card, or loses everything if they were wrong. Each card you win is more cats to count! First to 5 cards wins! Normally, the first slapper becomes the flipper for the next round and cannot compete. In the 2-player variants, players take turns flipping a card from the deck and they can both compete. The main restriction for the upper playercount is the number of players able to reach the flipped card to slap it. -description from the designer