Doodle Invasion Free

Is it a bird? Is it a plane? No, it's a gigantic space ship and it's dropping a big green DoodleInvader into the ocean…oh great. Use your doodling skills to create breakers to stop the evil spawn of the giant green alien from reaching Doodle Bay in this addictive and challenging doodle defense game! 
oh buoy…. The object of Doodle Invasion is simple;