Couple things to demonstrate why it's laying out weird:

This is a quick (super quick, my lines are awful) idea of the lines each of your shapes are implying as far as perspective goes. See how some of the shapes just don't adhere to the same line of sight? Your center island is definitely a point of contention here when it comes to perspective because it's sitting more flat instead of at the angle that the first petal sits.

(stars, because it's in spaaaace!

)
Another way to look at it is to shrink it down and toss it on a sphere because technically that's what you're trying to imply for your land mass, I used HarvyDentMustDie's version to contrast and give you an idea of how it adheres to the perspective.
I hope this helps to illustrate the idea a little better, sorry some of it is a bit off!