amazing work! just watch out for a bit of clipping in the youtube version (though it seems like this doesn't happen in your raw files). i love how cohesive these tracks are. for example, the menu theme introduces the musical ideas in a subtle but effective way, setting the stage for a player to experience the rest of the music meaningfully.
as for a guess about inspirations, maybe some zelda? specifically those descending chromatic notes in the main leitmotif :)