This was a really nice quest, I had a lot of fun playing through it. So I'll start off with the positives. Screen design is really nicely done. I like the TRIFORCE style mountain design which adds a bit of depth in the overworld and I also like how the dungeon design slowly gets better as the quest goes on. The quest flows pretty nicely too, and there isn't any issues of constant backtracking or tedious segments, which is nice to see. I also love the neat little touches included, such as the world going dark after getting the Magic Sword, and Level 4 changing into Level 5. I never managed to find the bonus dungeon though (mostly because the clues made no sense to me lol), but I imagine that dungeon might be as good as the other 5 dungeons in the quest. There isn't much to say on dungeon gimmicks, but I do like the idea of the first sword dungeon, where you have another layer below you. I found that be really clever.
The only negative thing I can say about this quest is the difficulty balance. Up until the end of Level 2, difficulty was pretty perfect, though a little annoying at the start with having to avoid fast Octoroks to get into Level 1. I think the difficulty started to become an issue after Level 2, where the world begins to open up a bit. I think the difficulty got a little too much after that point, especially with so little health (5 or 6 hearts) and having Darknuts and Wizzrobes being thrown at you. The Blue and Red Rings helped a bit, but I still think it was a bit too much to handle, and I died quite a bit because of that which brought down the experience a bit, mostly because it felt a bit cheap rather than challenging.
I also found a few other minor things.
This happens on every bombable wall. I'd probably suggest to make the top of the walls overhead so that you can prevent Link from somehow walking on top of the wall. Same can be said for
this, though instead of the wall, it's the door.
This appears to be an oversight. There's no undercombo and the block doesn't do anything when pushed. Same thing happens in Level 4 in the same room, though that one has an undercombo. And one last thing, I found a
typo here. Should be "reaching" not "reacing".
Overall though, I had quite a bit of fun playing this. A lot of things were done very well, though the only main issue I have is the unbalanced difficulty in some places, which brought down the experience quite a bit. I'd give this a solid 4/5. Nice job and I'm looking forward to any more quests you might release.
