As a fan of 'new-original' quests, I hope to finish all these 'Quest 5' hopefuls before all is said and done. As chance would have it, this is the first one I'm working on.
Having now completed the quest, I can offer my two cents:
The game certainly had the feel of an NES quest, a worthy successor to the line. I particularly liked the location of Dungeons 3 and 8.
I looked up a list of Kanji symbols after playing. Sure enough, I saw the patterns. Nice touch. (I don't know if the 'days of the week' reference was necesary, but I see where it came from.)
Not sure if this was a bug or not, but there is one cave with nothing in it. It might be where the 5th Heart Container was supposed to be, but the screen was close to another screen that did have one, so I'm not really sure.
Another minor 'typo': a room that was 'off the map' in Dungeon 1 appeared on the Subscreen Map.
I thought the early dungeons (particularly Dungeon 1) were too large compared to the later dungeons.
Dungeons 7 and 8 allow you to traverse the entire bottom row of rooms. I'm not sure it was supposed to be this way, but it made traveling around those dungeons too easy.
I never found the Red Ring, either. I suspect there was a room with blue Wizzrobes in the Southeastern part of Dungeon 9 that was 'supposed' to contain it, as it was otherwise a 'dead-end' route with no purpose. That made defeating a twice-as-strong Ganon that much harder.
Overall, I enjoyed playing through this quest. I don't have any comparisons to make, as this was the first one I did, but I do like what was done.