hide & seek squid

you are in squid game season 3 hide and seek and the rule is that if you get a red ball out of the gumball machine you have to kill one of the blue balls within 30 minutes of the arena the blue ball players go in the arena first and hide from the reds and the red ball players get a knife which they can use to kill the blue ball players get a key which can open doors if its the correct shape