A boy jumped with a parachute from a flying airplane. His target was to reach a castle which is located in the middle of a forest. While he was gliding in the parachute wind flew vigorously and pushed him towards a building somewhere in the forest. His parachute got separated from him and he fell near that building and his parachute fell on the roof of that building. Help him get to the top of that building so that he can get his parachute back and fly to his target. Good luck.