UFO Attack

Your space ship got in the galaxy of evil aliens.
The aliens do not see your spaceship, but they have a scanner that they can find you.
If you find yourself in the alien scanner, then it starts to attack, ramming your ship.
You should have time to fly away from the ship alien ramming you.
Skill maneuver your estimated points, the longer you are in the field of scanning alien ship,
the more will get points.
After an unsuccessful attack, alien ships explode overload, for them you get points, too.
With the increase of points, the aliens send more of their ships.