On this map, you will have 5 floating islands and 4 platforms to build from and to over the open void.
On each island, there will be a small bedrock structure with a button on top that consumes your Xp and gives you an item, but how much Xp that's needed and what item it gives varies island to island.
Unlike the islands, the floating platforms and their bedrock structures are plain to see and the amount of Xp needed is set across all platforms and displayed out in the open, however, what item they give is still for you to find out.
Connect all 5 islands and 4 platforms or stay confined on the main island and set up the 8 other bedrock structures as small shops, how you live out your time on this map is up to you.