this is an amazing game! SO polished for the amount of time in which it was made. it totally takes me back to playing Zelda and Metroid, both of which were among my favourites and both of which share a similar vibe to yours. i have no suggestions at all, because it's basically a flawless example of this type of game. very, very well done!
side note: i'm also so impressed that you've taken the time to make playthroughs of the other submissions. it's a great example of supporting other developers and making the jam a super positive experience overall. A+++