I took a look on your island, in a chopper, getting down and walked sometimes...
What I liked: the size, the coast part...
some remarks:
I think that for a jungle type island there is too much straight macadam roads, perhaps it would be better with tracks...
It's strange to find towns of concrete, greek, incas monuments, medieval castles... (too much smoking?)
It could be great to have a more mountainous (volcano?) central part in the island.
Critics are easy, great job anyway!