I'll explain about the Island
1. the building zone
You can build things in it and there are some specialty blocks like telempolines, water and a block that makes you move faster.
2. The couconuts and slimes
Couconuts can be found in many places and one of them is picture 1. It has a stone plate and standing on it will make a bridge to the couconut. With coconuts, we can make 5 slimes for every 50 of them. (2)In picture 3, there is this machine and you can buy new blocks.
Picture 1 ^
Picture 2^
Picture 3 ^
3. Terrain
Some portals exist and it teleports you to other portals, which some leads to unaccible places.(1&2 picture) Pineapples will boast up your speed.
Picture 1^
Picture 2^
Maybe the forth pig(?) will build with trempolines!