This is a pretty good hack, but there are certain aspects that give a negative feel.
I certainly think that this ROM Base is being overused, but it's your choice, I don't really care about graphics unless they have errors and glitches in them.
First of all, you should work on the sprites.
The hero and heroine's body parts are simply fusions of a variety of sprites, and the angles don't make sense.
The overworlds are actually pretty bad (especially the right frame of the hero), as their heads are too big, and there is no shading.
The maps are okay, but you should fill in some free space in them.
The only positive aspect to this hack I can see is the storyline.