The Galaxy Invader is a 1985 science fiction film directed by Don Dohler. The beginning credits are interminable. Well, not literally interminable, but it feels that way with 2 1/2 minutes of printed names against a black background. When the movie does start it's a slow one. I didn't watch all of it. I do have a few other things to do, and life is short.
Watch it online via GoogleVideo:
or from the Internet Archive.
Weird Wild Realm gives a thorough plot overview and then says, "Obviously this is simply an awful, awful movie."