#shoot-em-up This genre involves controlling a character or vehicle that shoots enemies while dodging their attacks. In "Centipede", players control a shooter at the bottom of the screen, aiming to destroy a centipede that descends from the top, along with other insects. #fixed-shooter This subgenre of shoot 'em ups typically involves stationary or horizontally limited movement for the player's character or avatar, who defends against incoming enemies moving in various patterns. In "Centipede", the player's movement is limited to the bottom area of the screen, shooting vertically at the descending centipede and other obstacles.