To unlock the double blaster, you must leave three enemies alive during level three, no more, no less. This gives you the double blaster for the duration of the game, even if you lose a life.
In the second level, destroy the fourth and fifth enemies that come on screen with the double blaster at the same time. The number of bombs you have stays the same, yet you're able to use as many as you please.
Beat the game with over 2000 points
Beat the game with over 3000 points.
On the password screen enter: DM5JJ3MEDRA2SUBPUB99LB0DB4RG0VELF
In the first level, if you run into the 14th enemy to come on screen, a glich will enable you to go through ships and lasers.
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