Thank you very much for playing Jack and Detectives! We've received multiple reviews already, and among them, we've noticed several mentioning issues with starting the game. This game uses Google servers, so it cannot be accessed from within China. Therefore, it's possible that an error occurred due to the inability to properly connect during the game's startup, preventing the game from starting. If you live in China and purchased the game on Steam, please either request a refund or use a method to bypass China's internet restrictions to play. This patch will now display a similar message when starting the game.