Sure, here's an example of a game called "Find the Killer Animal":
Welcome to Find the Killer Animal game!
In this game, there are ten animals displayed as colored circles. One animal, referred to as the "Killer Animal," has a different color than the rest. The goal for the player is to find and click on the Killer Animal. When the player clicks on an animal, the script checks if it is the Killer Animal or not. If it's the Killer Animal, a congratulatory message is displayed. If it's not, an alert message prompts the player to try again.
Please note that this is a basic example, and you can enhance it further by adding more features, animations, and complexity according to your requirements.