Diet Family is an "Unique! Fusion Shooting Game!!!", at least according to the advertising flyer. The game's official description for the Game Rating Board is more humble, it bluntly calls the game out a Galaga clone, which seems to be the more appropriate version. One or two players shoot cartoony enemies in front of abstract, non-scrolling backgrounds. It is possible, though, to move in all 4 directions, contrary to Galaga's restrictive horizontal only movement.