Message From Space (1978) has enthusiasm, chutzpah-filled teenagers, deus ex machina, and galactic bad guys. It doesn’t have any real plot, logic, motivations, special effects, or any real reason to get excited.
Except for that spaceship that crashes right at the end.
Whether or not it’s a rip off of Star Wars, don’t waste your time. Even as a head-cold movie it’s a horrid bit of trash.