Nice to see someone succeed with this, I've seen alot of crap builds of Sunken temples, swamp temple etc. But you accually succeeded.
But ... I think you should remove some of the 198209102 diffrent tiles which you've placed.
Try to remove some BLOCKING items (by pressing "O" in RME you'll see blocked paths) and add some details which doesn't block a players path, since it'll make players annoyed after a while.
6/10. Put more fantasy into it. I'm hard to amaze x]