Looking for the name of a b/w alien invasion movie

Movie was on Comet TV a few years ago when they had a alien invasion movie-thon.

The aliens heads looked like potatoes and they constantly stuck what looked like a tongue in and out of their mouth.

Inside of the ship was about as low budget as you could go, the ladder looked like broom handles glued together and the control panels were boxes with plumbing supply parts attached. 

Thought the movie was named Invaders but I can't seem to find it.