The boy Zak and his friend Duckling Quack quite often play various intellectual games. Today we are in the game Zack and Quack Differences will join one of their fun. Our heroes decided to test their attention with a puzzle. You will see two pictures on the screen. They will depict our heroes. You will need to carefully examine them. There are some slight differences in the pictures and you will have to find them. To do this, carefully inspect both images. As soon as you find a distinctive element, select it with a mouse click and get points for it.