While a circle is the letter 'O', the triangle is 'J', and the square is 'M'. When placed together, they are OJM, the initials of the squid game that's called 'Ojingeo Geim' in Korean.

However, the Operator picked up a card with Squid Game's iconic circle, triangle and square symbols. As the camera zooms in, one of Squid Game's most recognizable soundtracks plays before we see the ...