They came from planet Earth
Everybody can be a hero! It all depends on the perspective of the observer.
Use your tongue, meteors, mines, bombs and even the enemy forces against itself to defeat the invading forces and save your planet over the course of 30 awesome levels.
Move the cursor to move the alien, click once to eat an enemy then click again to spit him out.
Move the cursor over the alien to take an x-ray picture of the alien's stomach contents, just in case you forgot what you last ate.