Divine Drama: As I Plunged into Endless Despair

[Some brain-teasers + not overpowered + one heroine + infinite-flow] Humanity is on the brink of destruction in the apocalypse. Most cities that once belonged to mankind have been reduced to ruins. Lu Li, a programmer hailed as “the last genius,” has exhausted every effort. Humanity faces nothing but endless slaughter and annihilation. Just then, a shadow enveloped Lu Li. When he came to, he discovered that he had transmigrated into the past. He also found a strange game. Curious, Lu Li entered it and discovered clues about “God.” It seemed he had become entangled in a most extraordinary affair... Was everything that happened an elaborate act, or a game...?