When you destroy a group of enemies, you are awarded 1500 points.These stages award a 10K-point bonus if the player manages to destroy every enemy, but otherwise 100 bonus points for every enemy destroyed. The game ends when the player's last fighter is lost by colliding with an enemy, being hit by an enemy shot, or being captured.Ī 'hit/miss ratio' statistic at the end of the game, and a bonus 'Challenging Stage' that occurs every few stages, in which a series of enemies fly onto and off the screen in set patterns without firing at the player's ship or trying to crash into it. In later stages, some enemies even break from an entering group in a frantic attempt to crash into the player. Enemies swarm in groups in a formation near the top of the screen, and then begin flying down toward the player, firing bullets at and attempting to crash into them. The player controls a starfighter that can move left and right along the bottom of the playfield. The objective of game is to score as many points as possible by destroying insect-like enemies.