Golden Oak Tree House Escape

This time me and my friends are going to visit the Golden Oak Tree house and it is located in England. It is really a very nice experience and it gives us a lot of memorable moments. My friends has gone out to see some other places and they have locked the automatic main door without noticing that I am inside. I can not able to open the door. So can you please find the related objects and solve the puzzles to open the main door and escape from the Golden Oak Tree House soon.