Abandoned High School Escape

Just imagine that you went to see the old abandoned school. While you were seeing the classrooms inside the school, suddenly the main door got locked and you got sucked inside the school. You alone got locked inside it and no one else there with you to help. Now you need to find the key in order to escape from the room. So, collect all the related objects and solve the interesting puzzles to escape from the Abandoned High School as soon as possible.