Continuity mistake: Level 5 "Mob Rules" cutscene: When Martin runs out of Sequel Stop with his new game he stops Ned, and in the first shot Ned's car does not have an antenna, but when Martin pulls Ned out of the car suddenly there's an antenna at the left side of the windshield, then as Martin drives away the antenna is now at the right side of the windshield.
Continuity mistake: Level 5 "Mob Rules" cutscene: When Marge reads the newspaper and Martin runs out of Sequel Stop with his new car-jacking game, there's a row of zebra concrete barriers behind the church, but when Martin pulls Ned out of his car and starts to drive off all those barriers have vanished, then they reappear again.
Continuity mistake: Level 9 "Invasion of the Yokel-Snatchers" cutscene: When Cletus tells the aliens that he spent all day clipping coupons for a "flat screen magic picture machine," we see the building behind him has nothing on its roof, but in the next shot a huge billboard has suddenly appeared on that building's roof.
Continuity mistake: Level 12 "Grand Theft Scratchy" cutscene: After Senator Clinton congratulates Marge and Lisa for their great work a large sign falls on her, and when the bag appears with the keycard inside, in the closeup the bag's strap is lying at the back of the bag under its flap, but in the next shot that strap is now lying on the opposite side of the bag, at the front, and the bag's position on the sidewalk changes as well.
Continuity mistake: Level 16 "Game Over" cutscene: When Bart grabs the save games and threatens to destroy it, we see the front labeled "Memo: Planet Earth..." and the back is blank, then when Bart holds it up the front is facing forward, but in the next shot the label faces the opposite way, note Bart's thumb.
Continuity mistake: Bartman Begins: Whilst Bart is reading The Simpsons Game manual, the shot is panning around him. In the background, there is a lamp post visible on the corner of the street. When Homer enters the scene later on, the lamp post has changed design.
Continuity mistake: Invasion of the Yokel Snatchers: Whilst Homer and Bart are watching the citizens being taken into the spaceship and Homer is asking where mall security is, there is a water fountain visible in the far background, and there is no-one standing next to it. The shot then cuts to the water fountain, where an alien is now beside it.
Continuity mistake: Bargain Bin: When the mothership flies over the Simpson house, Bart says this must be the level boss for this part of the game, at which point Homer puts on a pair of glasses to look busy. The mothership then starts firing on them and the family start running. When the shot cuts back to them after being fired at, the glasses Homer was wearing have disappeared.
Factual error: Lisa the Tree Hugger: After saving Lenny and Carl, Bart aims his slingshot at the target controlling the factory and fires a stone from the slingshot, hitting the target. Once the stone hits the target, debris from the impact can be seen flying off the target showing that it has been destroyed, but as the dust clears, the target is virtually intact.
Continuity mistake: Big Super Happy Fun Fun Game: After Milhouse emerges from the water, Lisa says to him, "Knock it off Milhouse, we know it's you" and she has her right hand raised pointing at him. When the shot cuts, her hands are at her side.
Continuity mistake: Big Super Happy Fun Fun Game: When Homer and Lisa are talking with Milhouse in the opening cutscene, Homer and Lisa are standing on the ground about a few feet away from the ocean, but in the shot where Milhouse says "But I'm so huge", Homer and Lisa are suddenly a much further distance from the ocean.
Continuity mistake: Big Super Happy Fun Fun Game: When Homer says to Milhouse "Hey, the girl said she's not interested. Beat it loser", Lisa is standing next to Homer, slightly behind him, but in the next shot, Lisa is suddenly standing slightly in front of Homer.
Continuity mistake: Big Super Happy Fun Fun Game: In the opening shot of the ending cutscene, an overview shot is of Homer and Lisa standing in front of the huge toilet. They are standing in some mud in the overview angle, but when the shot cuts to a closet angle, they are suddenly standing on the ground, away from the mud.
Continuity mistake: Big Super Happy Fun Fun Game: When Homer and Lisa insert the three Sparklemon into the coin slots, Mr. Sparkle rises and the area where Homer and Lisa are standing and where the coin slots are located can be seen in the shot of Mr. Sparkle rising out of the giant toilet. They are seen standing on the left hand side of the giant toilet, but when Mr. Sparkle "cleans" the village, the giant toilet can be seen in shot, but Homer and Lisa are nowhere in sight.
Continuity mistake: Big Super Happy Fun Fun Game: After Mr. Sparkle tidies up the town, Milhouse shrinks down to regular size and his crown falls off his head. The crown is rolling away from Milhouse and stops slightly behind him on his left. In the next shot, the crown is suddenly far behind him.
Continuity mistake: Big Super Happy Fun Fun Game: When Milhouse is about to give the key card to Homer and Lisa, he extends his arm to hand it to them and puts his arm in a bent position. In the next shot, his arm is fully extended, with no visible bend.
Continuity mistake: Lisa the Tree Hugger: In the opening shot from the first cutscene in this level, there is dirt at the bottom of the door to the Auntie Nature logging company. The door is there throughout the opening cutscene, but there is no sign of the mud at the bottom of the door in any other shot.
Continuity mistake: Around the World in 80 Bites: After Homer has been declared the winner, a pair of massive dentures are unveiled and the winner of the previous race gives Homer the belt. When Homer is attempting to put the belt on him, there is a small distance between him and the dentures. In the next shot, Homer has suddenly moved closer to the dentures.
Continuity mistake: Mob Rules: When Ned says Grand Theft Scratchy is going to turn kids into Stabby Sam's and Drive-by Denny's, Lisa is standing straight facing Ned and Marge is standing 90° to the right. The shot cuts and suddenly Lisa is standing 90° to the left facing Marge and Marge is standing straight forwards facing Ned.
Continuity mistake: Mob Rules: When Mayor Quimby and the games producer notice the mob of parents outside the building, Marge is standing near the front of the mob and a senator is standing next to her. When the shot cuts to focus on the senator, Marge is no longer standing next to the senator and has been replaced by Snake Jailbird.
