Your aim is to transport a gnu, a penguin, and a fish to the other river bank. However only one of these will fit in the boat along with you.
If you leave the gnu alone with the penguin it will eat the penguin. If you leave the penguin alone with the fish it will eat the fish.
Luckily the gnu won't eat fish.
Touch an animal to move it on or off the boat.
The animal being moved off the boat will be moved to the bank where the boat is.
Touch the arrows to move the boat to the other bank. Each boat movement counts as a game move.
Tap the screen whilst the boat is moving to make it skip to the other bank.