Escape Skull Mountain

Yesterday evening you were walking with your friends. Today morning you woke up in a terrible and cheese room. Looking around, you realize that you are in some sort of tower. The door was unlocked, and you managed to get out. The building is located at the top of the cliff. To return home, you will need to solve a couple of dozens of puzzles and riddles. To facilitate the task is to collect the materials at hand, because one of them may be unraveling.