13 details you might've missed in 'Squid Game'

Jun-ho sneaks into the games while wearing a circle staff member's uniform. He's corrected for speaking to his superiors, which gives viewers the first clue as to the ranking order of the staff.

Circles are the lowest tier. They are under triangles, who are under squares.

Though the square staff members, or managers, are the highest-ranking of the pink-clothed staff, only the triangle employees have guns.

Ddakji, the game Gi-hun plays in the train sation, is pretty simple.

Players attempt to flip their opponent's folded square of paper over by throwing their own piece at it.

It is similar to the American game Pogs that was popular in the 1990s and the Japanese game Menko.

When Gi-hun returns home after the first round of the game, a photo of his daughter, Ga-Yeong can be seen by the front door. In the photo, she stands alone.

In Ga-Yeong's mom's home, there's a photo of the child with her stepdad, mom, and other sibling.

The differences between the two photos seem to symbolize Ga-Yeong's connections with each parent — a close relationship with her mom and a strained one with her dad.

When Jun-ho looks through In-ho's room, he finds the business card for the game in a gray box with a pink ribbon.

The coffins that the players' bodies are placed in are identical to this, with even the ribbons tied the same way.

When Jun-ho takes photos of the files he finds, his camera makes a shutter sound.

This sound usually happens when a phone has its ringer on, which seems odd since he should have put his phone on silent to avoid a sudden alert or notification blowing his cover.

During the deadly first game of Red Light, Green Light Il-nam doesn't seem fazed or concerned. Instead, he seems delighted to play. We later learn that he thinks playing the games is even more fun than making them.

He also seems to have a lot of knowledge about the games that will be played. He speaks about how familiar he is with marbles and his strategy helps his team win tug-of-war.

Il nam is also incredibly familiar with the neighborhood set for the marble game — likely because he helped create it.

In addition, after he loses the marble game, Il-nam is never shown getting killed. Viewers just hear a gunshot off-screen.

When Jun-ho opens the binder of 2020 player files, the first page is for player 002.

This seems like a mistake at the time but makes sense since 001 is the organizer of the games, Il-nam.

While excitedly discussing how her team wins tug-of-war, Mi-nyeo talks about how she felt "much more powerful" when she leaned back.

Just two episodes later, in the fifth game, she kills Deok-su by grabbing onto him and leaning back, throwing them both off of the bridge.

During the eighth episode, viewers can clearly see giant murals on the bunker walls when the three remaining players return to the almost empty room.

The stick-figure drawings correspond with the games played and they have actually been on the walls the entire time.

After realizing that Il-nam wet himself, Gi-hun ties his jacket around the older man's waist to stop the other players from seeing what happened.

In return, Il-name gives Gi-hun his 001 jacket, which may have foreshadowed how Gi-hun would become the No. 1 player at the end of the games.

When the players go back to their normal lives during the second episode, they each do something that relates to how they'll die.

Ali steals money from his boss and he's later eliminated after Sang-woo steals marbles from him.

Deok-su jumps off a bridge to avoid the debt collectors chasing him. He dies when Mi-nyeo forces him to fall off the game bridge with her.

While threatening the man who she's paying to get her mother into the country, Sae-byeok holds a knife to his throat. She later has her throat slit by Sang-woo.

Earlier in the season, he rejects money from his ex-wife's husband. He later initially refuses to use the money he wins in the game.

During the final episode, Gi-hun asks the banker for 10,000 won. This time, he actually gets it.

He previously asked for the same amount of money from the loan shark during the first episode and didn't get it.