Halloween Eve Escape

This is the moment a Halloween fun. Some wags locked you in the room. The whole room looks pretty grim, all done in a Halloween style. Your goal is to prove that this game can play two, and find a way out of the room. In this game, brute force does not help, because the door is locked and no windows in the room. A cursory study of the room, one can immediately detect strange pumpkin head, probably clue in them. Also key for escape codes and ciphers need. In fact, this game is a big puzzle.