The player controls a collection of pets who try to defend their human owner against ghosts in their home. Every night, ghosts sneak into the home with the goal of making their way up to the loft bedroom and devouring the owner. As the ghosts climb each level of the home, the pets try to defend their owner by attacking the ghosts. The pets must defend their owner until the sun rises.

The purpose of the game is to have players feel a sense of attachment to their virtual pets by allowing them to be directly responsible for their well-being. Unlike other tower defence games, the player is not given an abundance of each type of pet. Instead, they are only given one of each pet type and must take care of them.

Shiyi Du, Kristen Grinyer, Anny Ky, Dan Li, Tran Pham