| Instructions | |||||||||
| Wait for the applet and sounds to load, then click "Start." The aliens will be moving from one side to the other slowly decending. The object is to shoot all the aliens before they reach you. | |||||||||
| Scoring | |||||||||
| You earn points as you destroy aliens and proceed through the levels. | |||||||||
| Winning/Losing | |||||||||
| Destroy all the aliens to win the level, but if they reach the bottom or you run out of ships, you have lost. | |||||||||
| Controls | |||||||||
| Keys to move | Other keys | ||||||||
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