[pooper200000]

As the title says I made the crude diagrams for stranded. These are crude diagrams. The numbers on the top level that correspond with the middle level are ladders that connect them from the middle level to the top level. The circle on the bottom level depicts the small area the lava flows will not touch. The 1, and 13 points would be warpers that are in the middle level of your base. Points 3, and 7 would be connectors to the bottom level from the middle level. They would be a barrel, or box. A secret passage much like the secret bunkers on Wild Cross. The islands on the top level would only be connected by a sea faring vessel, an undecided sea faring vessel.

Edit:
The first one (Going from the left) is the lava cave like area. The middle diagram is the bunker. The top diagram depicts the arrangement of the islands.