Face Invaders is an interactive arcade-style shooter where players use their facial movements and voice to control gameplay. The game leverages camera technology to overlay space invaders on the player's video feed, creating an immersive experience where the player's face becomes part of the game world. Players defeat waves of aliens by opening their mouth to shoot lasers or making sounds to trigger special abilities. As difficulty increases, players must navigate through increasingly complex enemy patterns while managing power-ups and avoiding obstacles, all controlled through natural facial movements.