In the game, there will be many levels with different themes. For example, in a beautiful natural scenery level, there may be elements such as mountains, rivers, and forests in the picture. Or in a lively city street scene level, it contains contents such as high-rise buildings, streets, vehicles, and pedestrians. There is also a lovely cartoon world level that shows various cartoon characters and fantasy scenes. Each level is composed of two pictures that seem the same but actually have subtle differences. Players need to find these differences to clear the level.