Wow that box wasn’t easy at all, I learned a lot, it tooks so much time to finish this but I don’t regret it . I had most of the concept but here you need to go deep enough and make no mistake.
Initial foothold: enumerate until you find the page where to travel, try to send your “request” by “another route”
User: When you are able to travel, you are still at the beginning of the road, look for hints and go back, there is not only one way
Root: The user that has access to all the roads can make anyone travel to the root