Other mistake: Level 10 "Bargain Bin" cutscene: When the spaceship flies over the house all the Simpsons walk out the front door, and in this overhead shot part of the house is missing, note the animation is incomplete behind the roof of the garage.
Continuity mistake: Level 10 "Bargain Bin" cutscene: When the alien mothership hovers over the Simpson house, the green door mat is on the step in front of the door, but when Homer freaks out the green mat has vanished, though it reappears when they start running.
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.
Other mistake: Big Super Happy Fun Fun Game: When Homer is crossing the bridge in the lava part of the level, as he reaches the second half of one of the logs, he begins to weigh down the log. If you switch to Homer Ball, he logs becomes less weighed down than when he was regular Homer, despite the fact that Homer Ball is basically an obese and more overweight Homer.
Continuity mistake: Big Super Happy Fun Fun Game: The first part of the level consists of Homer and Lisa defeating the Dirt Sumos. But as soon as the cut scene starts, all of the sumos have vanished. Even the ones that weren't defeated.
Continuity mistake: Bargain Bin: When the mothership starts firing at the Simpsons, Homer drops the clipboard and pencil he was holding and it lands on the ground. Two shots after, the clipboard and pencil have disappeared. It couldn't have been out-of-frame because when it lands on the ground, it is in line with the path leading to the house, and the area surrounding the path is shown two shots after.
Continuity mistake: Enter the Cheatrix: When Bart and Lisa walk up to the Rift Portal after saving Frink, the device attached to the side of it changes design between shots.
Other mistake: Big Super Happy Fun Fun Game: At the start of this level, Mr. Dirt (i.e. Milhouse) emerges from the ocean, but Mr. Dirt is approximately 30 feet tall and the water is far too shallow for him to have been hiding his entire body inside the water. The water only goes up to his knee area whilst he is standing in the ocean.
Other mistake: Grand Theft Scratchy: Two shots after Marge says "I just don't understand why Bart would want to play this game" shows three cats in a car pulling up to shoot three mice walking on the street. The cats take out their guns, aim straight at the mice and start shooting at them. The shot then cuts to the mice, completely unharmed and start shooting the cats. Before the shot cut to the mice, the cats were shooting their guns for a full 1-2 seconds. If the cats had their guns aimed directly at the cats and started shooting, even for this short amount of time, the mice would already be dead even before they could take their guns out.
Suggested correction: This is a game within a game, based on The Simpsons' Itchy and Scratchy Show. The violence is supposed to be cartoonishly nonsensical.
Continuity mistake: Enter the Cheatrix: There is a machine next to Bart, Lisa and Frink when they reunite in the end cutscene. This machine has three sections to it. When the shot cuts to Bart and Lisa, all three sections of the machine are visible in the shot, but Frink cannot be seen in the shot. Then the shot cuts to Frink (with all three sections of the machine being visible in the shot), and Bart and Lisa cannot be seen even though they should be right next to it.
Continuity mistake: Enter the Cheatrix: When Bart and Lisa walk up to Professor Frink whilst he is climbing down the ladder, the machine next to them has a couple of dials on them. Around these dials are a series of small lines (presumably a way of measuring different gauges). When the shot cuts to focus on Bart and Lisa, these lines around the dials have disappeared. A small arrow attached to the dials also disappears.
Continuity mistake: Game Over: Whilst God is explaining the Planet Earth game to the Simpsons, Maggie's face has light cast on it. But later in the cutscene, after the flashback of God losing the manual, Maggie's face is suddenly shadowed.
Continuity mistake: Game Over: When Homer tells God "It's time for some answers", his hands are raised and placed against each other. When the shot cuts, his hands are at his side.
Continuity mistake: Game Over: When Benjamin Franklin is telling Lisa she's a bigger butt-kisser than Thomas Jefferson, he is holding a coffee cup with his hand at the bottom of the cup. Two shots later, his hand is suddenly further up the cup.
Audio problem: Game Over: After Marge says all that's left to do is hope God saves us, Lisa says "That's it, mom." When she finishes the line, her teeth clench together, but there are no words or letters in the line that would have made her teeth clench together in the way that was shown. Clearly the wrong mouth movement was used in the animation.
Revealing mistake: Game Over: When the characters are all running toward the door to Springfield, an anthropomorphic dog from Grand Theft Scratchy can be seen running over a piece of rubble on the ground. His posture or balance are not affected in any way, almost as if it was drawn so his foot wasn't supposed to interact with anything on the ground.
Continuity mistake: Bartman Begins: When Homer asks Bart "what's with the broody get up", there are three buildings shown in the background to the right of shot. A couple seconds later, when Homer and Bart open up the manhole cover, there is now only one large building.
Revealing mistake: Bartman Begins: When Bart is telling Homer about his new powers, there are a couple of buildings to the left of shot that are drawn incorrectly. The doors to these buildings are drawn almost exactly the same as the windows, where there are no door frames or handles shown on them.
Continuity mistake: Game Over: When Shakespeare says "Stand and unfold yourself", he is holding a quill in his left hand. The way the quill is held changes between shots.
Deliberate mistake: Game Over: Just after the gates to heaven have closed on Homer and Bart, the two look up and see Shakespeare standing on a floating cloud just above the gate. However, in the initial wide shot of the gates when everyone else was running through it, Shakespeare could not be seen floating above it, presumably to make his character reveal more amusing.
