Witness the evolution of mobile phones through different eras in Phone Evolution. At the start of the game, players will own a 1980s phone with an interface. Players will encounter blue and red doors along the way. The blue doors will transport your phone to more advanced eras. At this time, the phone's interface will also change in a more modern direction. However, entering through the red door will transport the player's phone to earlier eras. Its interface will become old and outdated. As long as you keep your phone more modern than the 1980s, you can complete the level.