 Flying near the star can provide a gravity assist to the player at the risk of misjudging the trajectory and falling into the star.If a ship moves past one edge of the screen, it reappears on the other side in a wraparound effect.A hyperspace feature, or "panic button", can be used as a last-ditch means to evade enemy torpedoes by moving the player's ship to another location on the screen after disappearing for a few seconds, but the reentry from hyperspace occurs at a random location, and there is an increasing probability of the ship exploding with each use.