Escape (itch) (Nitikk)

Escape is a story based on a blue room which happens to unwrap when you mistakenly moved a book in the shelf in your Headmaster's room while you were in there waiting for him to be back, a door opens up and you entered it because you were curious. You find strange stuff in the room which clearly depicts this room is used for illegal purposes.

Now you are locked inside, you believe there must be a key somewhere which opens the door. 

Find clues, hints and objects before Headmaster comes back, to find your final key because it's the only way out or you DIE!!