Well here it is, I suggest making the island(sand) part bigger so its not so crowded.
Dark Blue Water Layer 1
Light Blue Water Layer 2
Sand Layer 1
Dirt Layer 2
Grass Layer 3
Seafoam is: 
Coral is shaded with a non-collision barrier on top of it.
Palm tree;
How to make a good looking Palm Tree in Gimkit Creative (Difficulty 2/10 or 🟦 )
Some Art topics can have a solution box, but apparently this one doesn’t, so if you really want to close it, you can
- Move it to help and mark a solution (or have someone move it to help for you)
- Wait for Blackhole to come along and close it for you (if you want)
Agreed