A horizontal decryption game with light and shadow as the basic elements. The main gameplay is to realize the conversion between the real world and the shadow world through the illumination of flames, and decrypt the game through the operation of the protagonist and the protagonist's shadow. In terms of gameplay, we mainly use the changes in the properties of different objects in the real world and the shadow world to design characteristic levels. In terms of storytelling, the combination of the dark background tone, bonfires, shadows, and the imagery expressions of the protagonist will present players with a game world that can be chewed and savored.