In the game, the player's ship is placed in a level with a number of bases to destroy. When all the bases are gone, the stage boss appears, who must be defeated in order to move on to the next stage. There are eight stages, and in all of them, except the final one, the scroll is not fixed; the player can move either left or right, although the stage loops. The final level consists of a rematch against all of the previous bosses in succession before facing the final boss.