To receive a PG certificate the film was extensively re-edited by the distributor, and the finished product was then cut further by the BBFC to remove cocaine footage and references. In total 6 minutes 10 secs were edited from the film.
The name of the game of sport that the morons from outer space played in the space-ship was "Spaceball". Around two years after this movie was first released, another sci-fi comedy was made and released, that being Mel Brooks's Spaceballs (1987).
5 minutes into the movie, if you closely behind Graham (Griff Rhys-Jones) in the UKBC television studios scene, you can see a poster of "He-Man and the Masters of the Universe" and "Star Wars: Episode V - The Empire Strikes Back" on the wall.