What the heck is the kill threshold in designing a horror dungeon?

Having been transported to a terrifying dungeon that descends upon the world, Youxing is immediately framed and killed on the spot. To resolve the issue quickly, he has to risk his soul and become a dungeon designer. If he fails to design a terrifying dungeon within three days, his soul will belong to the dungeon administrator; if he succeeds, he can regain his body and obtain the tools to solve the problem. Little does he know that it's a trap set by the dungeon administrator to devour humans. As a trainee designer, Youxing, lacking sufficient authority, has no chance of designing a terrifying dungeon that will frighten the Chinese. Three days later, Youxing miraculously succeeds, leaving the dungeon administrator even more confused. "A terrifying dungeon that doesn't kill people can't be called a terrifying dungeon!" "What does 'Kill Line' mean? Isn't it just a simulation of a beautiful card?" "Why does the Monument of Terror give it a super S-rank rating?"... When the [Kill Line] dungeon officially arrives in China, no one takes it seriously. In everyone's eyes, it's just a reward from the terrifying dungeon, allowing them to experience the new free world ahead of time. Many even boast about clearing it in one life. Youxing looks at the confident expressions of the players, his lips curling up even higher. "I hope you all keep your healthy smiles until the end."... Two months into the game, the players completely broke down. "Mom... I can't look at century egg and lean pork congee the same way anymore..." "Finally, I understand why Beautiful Blackie doesn't like to take baths." "Stop! I feel like throwing up whenever I hear the siren's chant." Looking at the screen filled with negative energy, the dungeon administrator was stunned. So, dungeons that don't involve killing can actually take off?