PS Plus members: Call of Duty: WWII is part of the monthly games lineup for June, and will be available for download starting May 26. The company caught some flak for its May lineup of Cities: Skylines and Farming Simulator 19, so adding a major title into the mix might sate some critics from last time around.
In short, the voice is an evil entity 'playing' with Kevin and Kaylee. Kaylee doesn't play by its arbitrary rules and is removed. The repeating cartoon disappearance shows exactly what the entity is doing to Kevin, tormenting and mutilating him over and over again for its own amusement, for 572 days and into infinity.