From the box:
After a long dark winter it's party time at the penguins. The sun is shining and, once again, there's fishing. To oversee the waters, the penguins build high pyramids. The more penguins fit in the pyramid, the better. But it's not that easy.
The players together build a pyramid, and who adds most cards wins.
This game looks very similar to Penguin, but not only differs in components (this is a card-game while Penguin had Penguin-playing pieces), but more importantly differs in number of colors and distribution.
Penguin has 4 colors with 9 pieces each, while this game has 5 different colors with a distribution of 4x7 + 1x8.