The invaders come in several forms, looking like rats, lobsters, monsters, and babies. They fire pretty quickly, although the player can fire several shots in only a couple of seconds, but they travel fairly slowly. Also, when the player gets down to only one remaining invader, it still won’t move very quickly, unlike with just about any other Space Invaders games. There aren’t many sound effects, just when the player’s base gets hit, the saucer appears and gets destroyed; the rest of it is techno music.