I think the capitalized letters puzzle in the poem is just hard enough to be interesting but still plausible for players to decipher, which is great. I liked the idea of sentient weather and you did a good job of making all the treasure unique - who doesn't love a flying carpet?
If I ran this I would probably limit the ability of Wings of Corowin to just 1 round rather than 1 hour and open up the recall ability of Lament's Edge to any user rather than being restricted to the warlocks.
It feels like there's a bigger story at play that would be interesting to see expanded in a future release.
I noticed there wasn't a cover image for this in the game jam, so I put one together using your title text and map - I hope this is helpful!