People would not be oriented the same inside the OASIS as they are in the real world. This problem was evident throughout the movie, and at its worst, was during the final battle on Planet Doom. Even if you could argue that the 6-ers were to start out in some sort of strict formation in the war room as well as in the OASIS (unlikely), the further the battle rages, the more shuffled they would be with 6-er avatars 'zeroing-out', others filling any available spot in the war room, and making the MechaGodzilla shaped red mark in the war room impossible, and the cataclyst zeroing-out the whole war room in a wave pattern the grand finale of this specific blunder.
While researching Karen Underwood Morrow's death, Wade views two different newspaper obituary clippings side-by-side. Much of the text in both is identical, but the left one says, "Mrs. Underwood was fifty-six years old at the time of her death," while the right one states, "Mrs. Underwood was fifty-nine years old" in the same sentence. (59 is probably the intended age, as the right-hand article also shows "1975 - 2034" in the headline.)
1) During the 2029 scene of Halliday and Morrow, the type, orientation and cleanliness of the bottles and plates on the tables around them change a few times during their conversation. 2) Later, in the scene where Halliday and Morrow are talking about the date with Kira, the scene is paused while Curator, Art3mis and then Parzival step away for a side discussion. When Parzival pulls Art3mis away from Curator to talk some more, Halliday and Morrow are missing from the room and the table has changed orientation, but when Parzival starts to step back towards the scene, it is back to the same state as when it was shown paused.
When Aunt Alice gives Wade the ultimatum that if he took her equipment again she would kick him out, she is kneeling next to his feet, even with the counter. When the scene cuts to behind her and she gets up, she is about five feet further away from him, past the counter.
When Wade receives the message in his van from Nolan Sorrento he has the gloves from the X-1 Boot Suit. After his conversation with Nolan Sorrento as he is running back and calling his aunt to warn her, Rick answers the phone. It is shown that he is wearing Wade's X-1 including the gloves that Wade previously had in his possession.
When Parzival is playing Adventure he obtains the invisible dot without using the magic bridge.
When Halliday shows his younger self playing video games on a ColecoVision, there are only Atari 2600 cartridges spread out on the floor. However, there are no ColecoVision cartridges lying around, nor does young Halliday have the "ColecoVision Expansion Module #1" necessary to play the prior-generation Atari games on the newer-generation Coleco console.
When Sorrento enters the Oasis to discuss the 3rd challenge. The IOI soldier says the challenge is the Atari 2600. And there are thousands of games. In reality there are only 528 total games for the Atari 2600. These include actual Atari created games, games created by third parties and homemade games.
When the scene where the Sixers are introduced, they show two scenes, which flip back and forth between reality and the game. The Sixers are running down the pathway in the room and not on the device for connecting to the game. Inside the game, the show characters running down to their cars. Unless the entire room is part of the simulation, then they would never be synch'd with the game.
After Art3mis kills Nolan, she would have gained tens or hundreds of millions if not billions of credits, but moments later when Parzival kills her, he would have gained all those tokens instantly, which never appears.
Parzival doesn't count to 3 before throwing the Holy Hand Grenade, as depicted in Monty Python and the Holy Grail (1975). In that film, King Arthur counts "One, two, five," is corrected, and shouts "Three!" before throwing the grenade. However, these instructions are never specified in the Oasis so there is no particular reason to expect them to match the Monty Python version.
The junk pile of crushed cars seen at the beginning doesn't seem to have acquired a single model of car newer than about 2010, despite the whole pile sitting there up until 2045. However, although it's not actually mentioned in the movie the cars seen are abandoned cars that the occupants of "The Stacks" arrived in (they ran out of fuel so were basically useless) and were then piled up by the cranes used to make the stacks of mobile homes. It could be that the ones we see are simply from the first arrivals or that older cars were more affordable.
After Wade puts out a general call for help at the Columbus stacks and directs Helen to go there, she makes a right-hand turn. When the camera cuts to show the back of the van from the rear doors looking forward, Wade and the other three lurch toward the right side of the van. They should have been pushed towards the left side due to the turn.
When a policeman gets back into the left-hand drive police vehicle on the right-hand passenger side near the end of the film, incorrectly its black steering wheel is seen, indicating that the police vehicle is not left-hand drive.
In one of the early scenes, during the reveal of the interior of Wade's secret van hidden under a bunch of crushed cars, he hooks up the battery while narrating about living with his aunt Alice and you can see a shadow cut across the light beam hitting his leg. The shadow doesn't completely clear the beam of light before it comes to a stop, still leaving shadow. In addition, a fully obscured van wouldn't have that much light coming in through the windows.
During the final chase scene, the vehicles involved can be seen driving up and down the same street several times, evidenced by the dark bricked structure along on side of the road in shots supposedly several miles apart.
When Wade/Parzival is telling her how to release herself from the booth, he says that the panel openers are above her and her head at 9 and 3. This is false as the panel clips are at 11 and 1 respectively since they are not right in front of her, but clearly not on opposite sides as 9 and 3 would be.
On the scene set in the town against brick buildings, there is a banner for a car park with a United Kingdom 0121 telephone number on it. The film was shot in Birmingham (UK), but they did not digitally remove the telephone number.
In a chase scene about 1 hour and 29 minutes through, you can see a Nationwide Building Society branch in the background. As Nationwide Building Society is a mutual organisation based in the UK it would not exist in Columbus Ohio in 2045, and even if it did the branding would have changed by then.
Every movement the player does in the virtual world has to be done in the real world. The player needs to run in the real world to move in the virtual world. Even simple hand movements have to be done in the real world. However, several players are seen playing in the park or in an office chair. Playing on the street would be dangerous with lots of accidents. Only a few players are shown playing on a specially designed gaming rig.
Art3mis tells Parzival at the library that he needs a disguise now that he is on top of the scoreboards. She knows this because she entered wearing a Goro costume. Parzival dons the Clark Kent glasses and continues on through the library. Art3mis is no longer wearing a disguise and she is in second place on the scoreboards. Wouldn't she be mobbed like Parzival was? Especially if Parzival can recognize her from just seeing her Akira bike.
When Samantha is in Sorrento's rig, she finds a receipt for the Orb of Osuvox with the instructions. Sorrento didn't buy the Orb of Osuvox; Irok got it from the steampunk pirate, so there wouldn't have been a receipt or any instructions.
When Samantha is captured, IOI didn't think to requisition her Oasis possessions as she's able to access her personal inventory to use her drone orb to talk to the Orb of Osuvux. This is reasonable since it's established that OASIS accounts are password-protected, and even in real life you may need a lengthy court battle to force somebody to relinquish his passwords.
Besides being an overwhelming large chunk of the "real" economy, the OASIS has players running night clubs, repair shops/manufacturing and mercenary services. It also sells, from an in-game store, very dangerous grieving weapons that someone could use to kill all the players in a large area - and combat is enabled in places including a very high-end nightclub. Yet there's no sign of anyone offering banking or insurance, both of which are more central to any economy than service businesses.
Wade tells Artemis his real first name. Being a long time, loner, non-clan, and given that everyone would know about loyalty centers and how they ruin lives, Wade would have never told his real name to anyone. He also should have known about the ability to track and listen to others in the game.