After the guards stop the fighting and start burning the bodies, the frontman walks across the display showing the remaining contestants. Although there are now 80 left, there are 90 squares lit up.
Between the elevator ride ending and being handcuffed onto the rope, Player 001 would not have had enough time to explain his Tug-of-War strategy.
At one point Ali says he is from Pakistan. Upon inquiry by one character about Pakistan's location, another tells him that Pakistan is north of India. It would be generally more accurate to say that Pakistan is located to the northwest of India, not north, however it could be that the respondee simply is displaying their ignorance in the answer.
Byeong-Gi receives an egg with a note that tells him the next game will be tug of war, but this egg is hard boiled and had not been cracked, making the note impossible to place without damaging it.