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New York Times:
If it isn't likely to generate what Mr. Brooks himself refers to as 'Spaceballs II: The Search for More Money, neither is it anything less than gentle, harmless satire that occasionally has real bite.
The film's low-tech styling is roughly the cardboard inversion of the cinematic machines it parodies, and Brooks seems less inclined than usual to push the overkill urges too far.
How do you review a movie like this, anyway? I guess by saying whether you laughed or not. I did laugh, but not enough to recommend the film.
The crew flings itself energetically through space in search of laughs, but it will never penetrate the galaxy where Blazing Saddles and Young Frankenstein traced their giddy orbits.
Typically, the best conceits end in pratfalls, and non-Brooks fans may find that the gravitational pull towards the thumpingly obvious outweighs the wit.
Mel Brooks will do anything for a laugh. Unfortunately, what he does in Spaceballs, a misguided parody of the Star Wars adventures, isn't very funny.
The jokes in the films are all pretty much in the same vein -- you might call it borsch-belt postmodern -- and they're all on about the same level, too.