Game purpose:
Kill all aliens before they get you.
Win with fastest time and with highest score possible.
Instructions:
To start , first you must select difficulty level (between 1 - 9)
Tap anywhere on the blue area of screen to shoot at alien
Tap on bottom green area to move player ship.
You start with 3 lives. Each time you are
hit you loose one life.
Hitting alien gives 10 points.
Hitting a ghost alien gives you another life.
Hitting ufo gives 100 points.
Best score is measured by both best time and highest points.
Each level has its own best.
9Apps 4.9
