First, some slapstick jokes are irrelevant to the story itself and as a result the movie, of a modest length (86 minutes) though, occasionally drags. Variety's Brian Lowry commented that it was "just barely" capable of sustaining a longer plot than a television episode. Sheila Johnston of The Telegraph found that "the overall momentum flags at times" as the film overstretches itself, being "a salvo of comic squibs, some very funny, others limp." while David Edwards wrote that "there's a great half-hour show rattling around in here somewhere, but the rest is padding at its very dullest".
Second, there are some witty and satirical jokes, but some are shallow and not related to the plot. Cosmo Landesman stated that "much of the comedy is structured around the idiocy of Homer, which is a shame". Besides, people who are not familiar with the American culture and movies may not burst into laughter as often as the fans of the Simpsons do.
What's more, the film is not suitable for children as it contains violence, irreverence and negative role models, e.g. Dad strangling his kid and daring his son to skateboard nude, the mother saying "You're a woman. You can hold on to it forever", etc. Christians may also be offended by homosexual kiss, child nudity, female pointing the direction to go by swinging her breasts, Homer criticizing people going to church, crotch hit, baby-killing video game, etc.
Bruce Newman also criticized the fleeting appearances of many of the show's secondary characters, finding the film "[not] a disaster, just a disappointment." This may disappoint fans of those supporting characters.
Moreover, some critics doubt if it is necessary to bring the Simpsons to the screen. Kirk Honeycutt of The Hollywood Reporter stated that "little has been gained bringing the Simpsons to the screen." Phil Villarreal also pointed out that "instead of stretching to new frontiers, the film rests on the familiar." I personally don't agree with them as it is quite interesting to talk about conservation. (Did they use satire on this topic and the government on TV?)
Don't ask me why an animal drinking the water contaminated by the pig's mess become a monster with many eyes. Don't ask me why Homer falls in love with a pig and holds a pig (Spider-Pig) to the ceiling. Don't ask me why Homer hurts his eyes while hammering. It is a silly movie. Just enjoy it. 3.5 / 5
Ned Flanders: Thank you, Lord, for this bountiful...
Ned Flanders: PENIS!
Flanders' kids: [devoutly] Thank you, Lord, for this bountiful penis.
Marge Simpson: Go out there and face that mob!
Homer Simpson: But I'm afraid if I do, they'll kill you.
Carl: No we won't, we just want Homer.
Homer Simpson: But they might kill Grandpa.
Grampa: I'm part of the mob!
Billie Joe Armstrong: We've been playing for three and a half hours. Now we'd like to take a minute and talk to you about the environment.
[all goes quiet]
Homer Simpson: I can't believe we're paying to watch something we could see on TV for free! If you ask me, everyone in this theater is a big sucker! Especially, you!
[points to us]
Homer Simpson: Stand back! I've got a chain saw!
Todd Flanders: I wish I had a dad like Homer.
Ned Flanders: Well I wish you didn't have the devil's curly hair.
Tom Hanks: Hello, I'm Tom Hanks. The US Government has lost its credibility so it's borrowing some of mine.
Marge Simpson: How did the pig tracks get on the ceiling?
[cuts to Homer holding a pig to the ceiling]
Homer Simpson: [singing Tune to Spider-Man Theme Song] Spider-Pig, Spider-Pig. / Does whatever a Spider-Pig does. / Can he swing / from a web? / No he *can't*, / cause he's a pig. / Look out! / He is the Spider-Pig!
Homer Simpson: He's not Spider-Pig anymore, he's Harry Plopper.
President Schwarzenegger: I was elected to *lead*, not to *read*.
Bart Simpson: Don't shoot! If you kill my dad, you'll never know where the treasure is buried.
Bart Simpson: [on the blackboard, in the open sequence] I will not illegally download this movie.
[the Green Day barge is dissolving in polluted Lake Springfield]
Mike Dirnt: Gentlemen, it's been an honor playing with you tonight.