If the title didn’t give you a clue, Spaceballs is basically Mel Brooks’ version of Star Wars. “Darth Vader” becomes “Dark Helmet”. “Yoda” becomes “Yogurt”. “Han Solo and Chewbacca” become “Lone Star and Barf”. You get the idea.
Most of the movie is laugh out loud funny and a lot of it is so stupid you might end up having a snorting fit. Mel Brooks even finds some time to parody Alien.
George Lucas even sent Mel Brooks a note, saying he loved the movie, and how he was afraid he would bust something from laughing. When the director of the movie that you’re parodying likes your movie, you know you’ve made a classic.