I'd highly recommend using some shift mapping with the roofs of the houses. Case point, the one on the right looks as though the very top part (which I assume is a room on top of the rest of the house and supposed to have a separate roof) is joined together in one large, oddly-shaped, physics-defying roof.
It would also help get rid of the unsightly line in the top house's roof.
I also question the use of the world map tile by the old man (it's an oasis for the world map) and the use of stone stairs instead of the rock ones that would work better with the ground and water-cliff tiles (especially as there's not stone pathing next to them.)
Otherwise, I rather like the feel of the map. It feels quite tropical and warm, which is what I gather you were aiming for. Good job!