End Game: from F to S

Humanity around the world has disappeared out of thin air, and modern cities have become prisons of death. Ling Yun, an ordinary young man, wakes up and is forced into the end game. No signal, no rule description, no novice protection, There is only the passing time of survival and a cold warning: When time reaches zero, execute immediately. He was thrown into the first F-level novice game—— [One-way corridor] 12 players from all over the world have 5 choices of life and death. If you choose the wrong one, you will die. Some are irritable, some are fearful, some are calculating, some are broken, Everyone is betting their lives, only he is observing. I don't understand the meaning of "white marbles" or the secret behind the game. He relies only on details, logic, and calmness, See through the hidden clues that everyone ignores: Anti-skid lines, flashing lights, scratches on door frames, hidden numbers... When everyone was in despair, they broke the situation with one sword. This is not a game of luck, it is a game of rules. This is not a survival competition, but an IQ crushing. Starting from the dead city, traveling through deadly games: One-way corridor, silent classroom, mirror floor, countdown platform... With his ultimate insight, he solved all dead ends. In the end game, he is not the strongest, but he is the rule observer who should not be messed with. Live, break the rules, find the truth, Uncover the ultimate secret of the disappearance of mankind, the suspension of the world, and the arrival of the end game. ——When everyone is afraid of death, he is already understanding the world.