To score maximum points from a flagship you must take out the red escort aliens first, and then the flagship.However, killing a flagship calms the swarm for a period, allowing you to pick them off in formation while they recover. As time passes and more enemies are killed, enemies attack in greater numbers and can drop more bombs. The yellow flagships are the key to both scoring large amounts of points, and to calming the swarm.

However when they attack on their own their speed is faster than blue but slower than purple. Red enemies will generally attack alongside a flagship, mimicking the flagship's movements and protecting it.Purple enemies move the fastest and have wide, sweeping movements, allowing them to target you from the opposite side of the screen.Enemies from the middle row move slightly quicker. Blue enemies move the slowest and have less sweeping movements making them easily avoidable, but are nonetheless dangerous when attacking in groups or if you get trapped on one side of the screen.When a stage is completed the next stage will begin with a faster diving rate and higher number of simultaneous attacks/bombs than the last. As time goes on and the swarm is cleared, the enemies will dive at a faster rate and more will attack at once.Unlike Galaga, the swarm is able to sense incoming shots that they would otherwise move into and stop until they have passed. The swarm moves from side to side, shooting enemies in formation is the easiest way to clear enemies but also scores a lot less points than hitting a diving enemy.On web version above, left/right arrows to move, Z to fire. You can only fire one bullet at a time so make them count, if you miss you'll have to wait until the bullet leaves the top of the screen to fire again. The aim is to clear each swarm of aliens while maximising your score, dodging bombs and diving enemies in order to stay alive.

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