Fun game! I think the last dungeon could maybe be a bit shorter, as the puzzle to it mostly boiled down to 'checking if a path is open, if not, push button and come back'
Movement was pretty stiff, true to Zelda 1 from what I recall, but I'd prefer if it wasn't quite so committal.
Generally the boss design seemed fine, I liked the first boss the best, but the second one I could not seem to find a way to move to not get hit by the three directional attack, the top left corner seemed the best bet, but I'm not fast enough to dodge the last wave. I don't think I had much curse either, and I don't think it could be reflected. Always got hit at least once, but maybe I just missed something about it. Was able to damage race the boss down so it didn't end my run at least.
The overworld was cool, could do with something to let the player know where they have or haven't been. Almost missed the last dungeon thinking that I had already swam to all the unique zones there, but was double checking due to paranoia (and generally knowing my sense of direction is pretty poor.
The shovel was cool enjoyed being able to use it against the pit enemies, I think the reflect could be used a bit more for puzzles, and would generally like the other tools to see more use, but there's a lot here for the time given, so I'm not surprised some didn't see as much repeated use later. (perhaps an invulnerable enemy you need to blow into a pit with the wind wand for example?) Wasn't a fan of how you needed to dig to find stairs sometimes but would be forced to take damage when enemies came out. Maybe a brief period before they start moving would be nice? Otherwise it's a bit of a health check, and you lose more than you gain from the ones that had health pickups instead. For someone like me that likes to be fairly thorough, I had to dig them all to know if I was missing anything anyways.
The curse mechanic was interesting, but I didn't feel the urge to make use of it, especially when the character is already not particularly fast. I'd rather just take less damage and learn the fights better with more leniency towards getting hit. Maybe the kind of thing that'd appeal more to me on repeated playthroughs.
Sound design could have been a bit punchier, some more sounds for enemies and item usage would go a long way in improving the feel of the game.
Apologies if I'm critiquing too much, it was still a fun adventure, and kept me going all the way through to the end. Strong base to a game and very impressive for the two weeks to make all of this.