Continuity mistake: The Land of Chocolate: During the intro clip, Homer is sleeping with a Herschel's Smooches bag on his lap. During the ending clip later on, the Herschel's Smooches bag has vanished.
Continuity mistake: Grand Theft Scratchy: In the second residential district, Marge has to jump onto the roof of a radio station and put Maggie in the air vents so she can switch the station. When she is put in the vent, she is not in the same place as she was when Marge put her in. She is almost a few feet away from the entrance of the vent instead of being next to the entrance.
Continuity mistake: NeverQuest: As Homer and Marge kiss after taking down The Dragon (first time), the kids come to thank and hug them. Rod says "Is there anything we can do to repay you?" and Ralph is shown hugging Homer. In the next shot, Ralph has vanished.
Continuity mistake: NeverQuest: During the intro clip, the first shot shows a reverse angle of Homer and Marge walking. The instant shot following, they are suddenly standing still.
Continuity mistake: Bargain Bin: When the 8-bit Simpsons are headed for the furnace, they are almost half way down the line to the furnace. When the level starts, the 8-bit Simpsons are suddenly next to the platform Homer and Bart stand on, hardly anywhere near where they were a moment ago.
Continuity mistake: Bargain Bin: The wall behind the 8-bit Simpsons in the "Escape from Krusty Island" game is grey, but as the level starts, the wall behind them is black.
Continuity mistake: Bargain Bin: After completing the level, the Simpsons arriving in the theatre. No-one is shown in the ticket box, but when it goes back to the game, Professor Frink has suddenly appeared in the ticket box.
Continuity mistake: Bargain Bin: In the final part of this level where you have to save the 8-bit Simpsons from being thrown into the furnace, if there are only a few seconds left on the clock, the 8-bit Simpsons will appear next to the furnace. If you then pull a lever, a huge curtain will close the furnace. As the curtain is placed, the 8-bit Simpsons will have vanished from in front of the furnace, even if the lever is pulled only a few seconds before the clock finishes counting down.
Continuity mistake: Bargain Bin: In the wide overview shot of Homer and Bart exiting the elevator into the theatre, the 8-bit Simpsons aren't there. A few shots later, the 8-bit Simpsons suddenly appear.
Continuity mistake: Bargain Bin: Throughout the opening cutscene inside the Game Engine, all five Simpsons are shown together, but in the shot where Bart says "And poorly rendered" and Marge says "Which one is supposed to be me?", Lisa has vanished and reappears in the next shot.
Continuity mistake: Bargain Bin: When the Simpsons arrive in the Game Engine, they keep switching from all even with each other to Bart and Lisa standing in front of Homer and Marge.
Continuity mistake: Bargain Bin: As soon as the level starts, Marge, Lisa and Maggie vanish from next to Homer and Bart.
Continuity mistake: Bargain Bin: When Homer places the Duff can on the computer DVD player, the can falls over and spills on the keyboard. In the next shot, the Duff can vanishes.
Continuity mistake: Bargain Bin: At the start of the intro cutscene, the alien Mothership hovers over the Simpsons' front yard. In the next shot, when the Simpsons run outside, the Mothership hovers over the yard a second time.
Continuity mistake: Day of the Dolphin: During the intro cutscene, Captain McAllister is untied from the ropes. Part of the rope he holds in his hand, then eventually he drops the rope. As soon as the level starts, the rope he dropped is no longer visible.
Continuity mistake: Enter The Cheatrix: During the final boss battle between Bart, Lisa and the Ape, you have to strike the ape with Lisa's hand lightning and battle Kung fu fighters entering through elevators. If you completely ignore these fighters and just go straight to taking the ape down, the ape will die after 3 lightning strikes and fall into the game waste stuff. The conclusion clip starts to play where Professor Frink gives the manual to Bart and Lisa, and yet the Kung Fu fighters don't seem to be there anymore, even if you didn't bother to take them down.
Continuity mistake: Enter The Cheatrix: After Bart and Lisa break into Frink's basement, they discover a Rift Portal. The first shot shows the "DO NOT USE" sign a foot above Bart and Lisa's height. But as Bart walks into the portal, the sign is suddenly located at the same height as Bart.
Continuity mistake: Enter The Cheatrix: When Bart and Lisa knock on Frink's door, they receive no answer and smash the window basement down and enter the basement. As the window smashes, part of the wooden window frame falls out of the frame and lands on the floor. Next shot, the glass from the broken window is still on the ground for a split second, but no wooden frame.
Continuity mistake: Lisa The Tree Hugger: Lisa takes the The Simpsons Game manual off Bart. After Bart says "Can we skip this level?", Lisa starts talking to Bart and the manual has disappeared. There was also nowhere for Lisa to put the manual.
Continuity mistake: Around The World In 80 Bites: In the ending cutscene, the losing contestants have to clean up. There's hardly any mess when they start cleaning. But the place is suddenly filled with mess when Comic Book Guy says "Less references, more mopping" to Willie.