I really like what you're doing here
Maybe some minor adjustments on the roof and floor can be done (end of the floor texture has a hard edge on the beach. The roof has the opposite problem, this could use a more hard edge IMHO).

DONE.... Thanks....

Needs more water on the floor.

Nice work. The background perhaps could stand a little blur and shadow/highlight adjustment IMHO. Nice concept!

Looks like you had a lot of fun warping. It is time consuming work. Did you feel like you were in a time warp?

Please post your additional sources