Katz und Maus - Wer findet die meisten Mäuse
translated: Cat and mouse - who finds the most mice

From the box back that also contains the games rules:
The game consits of 32 cards depicting cats and mice. 24 cards are with mice, 8 cards with cats. They are laid out face down in a 4 by 8 grid after a good shuffle. A player turns over cards on his turn. When the revealed card is a mouse its good and he can continue turning over cards. He can secure his winnings and keep the mice or continue. When a cat is revealed the players turn is immediately over, the face up cards are turned face down again, the next players turn begins. Whoever has the most mice when all mice are revealed is the winner.

A simple push your luck game for children.