Game Groovy Space Invaders online

You have already spent many years in space, you were scouting new territories and build new bases. To one of your bases, approaching army of many thousands of aliens. They came to you to stop your experiences, they want to kill you and destroy everything on what you've been working. Today is not their day, you stop them now. Shoot all the spaceships that will see not let them win, all your efforts will not be wasted if you act quickly!