Well, it used to be more complicated, but people were telling me that it was too complex for a map it's size, so I removed two side buildings. There are several tunnels, like one through the cap point and the wooden bridges. The metal rooves have an enterable area and the team coloured buildings have access to the balcony.
To understand the complexity, you really need to either run around it, or see it in play. I'll try and get it into a gameday this weekend.