I quite enjoyed this, I found El Dorado! The final stages of having to follow the compass while in a stormy region was a bit of a puzzle and quite fun. It reminded me of The Lost Woods or the Gerudo Desert from Ocarina of Time. I also was really surprised by the grappling hook ability. I think it could have more player control, but it is fun to use. I also totally got trolled by the island with walls and just a sign. That gave me a chuckle.
I think an optional sail speed upgrade and a sprint ability would go a long way for the game. Maybe more use of the bombs if you ever expand on this?
It could just be me, don’t tell Kenney, but I really do not like the art assets in the game. However, I did like the bits of pixel art in this, and the game felt overall cohesive with the art used.