Free the caged penguins! At the beginning of each level you have to shoot the penguins through a tunnel. The number of penguins you launched successfully determines with how many penguins you can attack the polar bears and dive onto them. In the upper right corner, you can see how many bears you have to hit. If you fail, it is game over.
Click or hit Space to launch the penguins or to make them dive onto the bears.