 All power-ups "stack" to give an increased effect with multiple pickups of the same power up, increased size in the case of player bullet/beam power-ups, more mini-ships, or faster move speed.Picking up mini ships increases the player's firepower such that when they are picked up they fall in on the player's left and right wings and fire single shots as the player fires.By pressing the Hyperspace button, a mini ship can be used as a screen-clearing smartbomb.