INSTRUCTIONS:
The earth is under attack (again) by aliens. Your ship is indestructable, but the earth isn't.
You must save the earth by destroying the alien mother ship without letting any alien ships pass.
The aliens only need 3 ships to destroy earth. The alien mothership has shields wich your bullets cannot penetrate.
use the arrow keys to move left or right.
press the up key to fire.
GOOD LUCK.