"Zoo Keeper" has three different types of stages. In the zoo stage, Zeke must run around the edges of the screen to build up the zoo's outer wall and keep the animals from escaping as they try to break through it from inside. Each of these stages is timed, with items appearing periodically that can be picked up for bonus points. One item is always a net; if Zeke picks this up, he can use it for a few seconds to capture animals and put them back in the cage at the center of the screen. Multiple nets appear in later zoo stages. When time runs out, the player earns bonus points for every animal that is not outside the wall perimeter. Points are also earned for jumping over animals.