Trivia: They keep guessing the next game, however clues are hiding in plain sight. The illustrations on the dormitory walls depict all the games, from "Red Light, Green Light" to the final match of Squid Game.
The Man with the Umbrella - S1-E3
Plot hole: With all the cameras and guards watching, there's no way anyone would be able to use a cigarette lighter to help them pass the game.
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Suggested correction: The guards do not care about cheating as long as it doesn't break the rules of the game or challenge the integrity of the games. Using a lighter was not explicitly forbidden by the rules, so even if they saw it (which is not guaranteed), the guards wouldn't step in.