Just finished this. I really liked it! I had a couple issues with it, though: first, I'm not sure what you were going for with the trees and grass and other things stuck in the background in most of the "overworld" screens. They just didn't look as nice as the rest of the game did. Second, in the tower of the wind:
it was really hard to see at first which tiles had the Bank 15 Obj 5 on them. I think the background was way too light here. It obscured the savepoints too.
Last, it felt like the intro was missing a slide. That might just be me, though.
Other than that, it was pretty great! I thought the houses were a bit small on the inside, but that's really just a niggle. And I loved the village in the green cave.