Very nice mix of japanese composition with "sailor" epic aesthetic in Mind at Sea, that's an interesting blend and I would have liked to hear more of it, though you seem to have put the japanese aesthetic aside for the rest of the soundtrack. That's not a big issue but in my (subjective) sense it's a missed opportunity.
Overall the arrangements and production quality are really good, there's not really anything I can say. You clearly have some mastery over the style you went for.
Composition wise, you use a lot of ostinatos and "crescendo" type of structure which is perfectly fine - and you handle them pretty nicely - but I think you could try composition styles with more diversity regarding "movement". e.g an ostinato, which then turns into a crescendo, followed by a calm sequence, return of the crescendo, etc. What I mean is, I feel like some of them could get pretty repetitive in the context of looping tracks in a video game - depending on their implementation of course.
I liked what you did with water sound effects, it's always nice to have!
I'm very "critical" here but overall it's a really good submission with a great atmosphere and great ideas. :)