Zoopoo is a single-player game developed in Unity using the Vive Tracker. Players take on the role of a zookeeper equipped with a physical toothbrush enhanced by a Vive Tracker to detect real-world movements. These movements are seamlessly translated into the 2D game environment, allowing players to clean a hippo's teeth by physically moving the toothbrush in all directions. Adding to the challenge, the mischievous hippo disrupts the process, and players must complete the task within a time limit to succeed.