I like the concept of the island having two halves, one sand and one grass, however it is rather apparent that not much effort has been put into this island. lots of props are sticking out of walls, and don't really feel like they belong to any theme. Try putting some thought into how this island was formed, especially into how it was built and how it was destroyed. Try placing props realistically lying on the ground as if they have fallen from a high place, or thinking about 2 or three main colours that the old civilisation used. I did enjoy the cave area, it being my favourite part of the island. The expansive areas allowed me to use my grappling hook freely, however the vines kept me from swinging wildly and forced me to think about where I was swinging to. Unfortunately the caves suffered from the terrain being quite jagged and rough, and the props sticking out of the walls. for your next island, try building a set piece and then build your island around that concept. A set piece I used in one of my islands was a broken mine-shaft elevator, which gave me an idea for a dark and gloomy mine. If you cant think of any set piece concepts, you can always download others off the workshop, though make sure to credit them if you do!

Thanks for the comment. I spent efforts there, but you could see it I'm not used to the disponible tools. I never thought of using the other islands of the users (by specifying well that I did it). It's a good idea. I think it is important that I understand better how to make a clean island.