Absolutely amazing map. I really enjoyed it. The usage of all the different items was superb!!!
If you're considering making another Zelda themed map, consider Skyward Sword. You could use the umbrella as the sail cloth to reach the surface. You could also divide the surface into the three different areas, with different openings in the clouds to get there (you could even have the sword room with jungle keys to hit levers in order to open the pathways). The personality and diversity of the three areas would work really well. A bow/blow pipe (bow and sling-shot from SS)(you could even include the dart gun thingy as the sling shot's upgrade) could be used to break cobwebs to solve puzzles. You could use a grapple as the claw shot. You could even have the bug-net (not that it would have an actual use in the game). I think that the Zelda franchise fits really well for Terraria adventure maps and you've done a great job. I also think the ability to upgrade items in skyward sword would fit really nicely into terraria (upgrade bow with better bows, upgrade climbing claws to tiger climbing gear etc.). You could even have the magic missile as the beetle. You could also consider having life fruit as "heart pieces" (as it would take four to add up to one heart container (20 health)) and then heart containers as... well... heart containers (and have them accessible after you defeat a boss). I even think the final dungeon (sky keep (I think)) would work really well, as the different themed rooms would be awesome. This map was really amazing and I look forward to your next one! Some other items that you could use could be the tabi (the one that lets you dash to the side), the vile thorn (break cobwebs through walls) the flamelash as it wouldn't work in water and then have the magic missile/rainbow rod (which do work in water).
Hope you like my ideas, and maybe even use a few of them. I know you'll do a great job. Your level is just indescribable.
I hope you continue to make maps with only a small amount of items so that each item really gets fleshed out fully.
I really loved your usage of items in varied ways. I think that that is something that you should keep, as it really is just beautiful. You managed to make amazing puzzles without resorting to using the somewhat cliche usage of jumping accessories.
Thanks for making this absolutely impeccable map. Really, really enjoyed myself.