Dream About Squid Games Like Contest Numbered Heads And Math Equations

I was in a squid games like contest with hundreds of other people. We had to walk in a long line on a sidewalk. I look to the other side of the street and there's a man saying " don't do it!". I heard a gunshot and when I looked back he was dead. Everyone had numbers on their head in bold black text. I looked in my reflection and I saw mine was a blue 27 and looked like a software glitch. I tried to cover it up with a sticker. We went to this big building and the guards gave us a big packet of math equations. When we were done with it, the guards would look through it and if you made one mistake you would die.