Musically this is a really good soundtrack, there's a lot of emotion written into the composition and a good diversity of musical ideas. The nautical theme was well executed, I can envision the soundtrack playing beautifully to a surreal ocean world.
The mix however felt very dry, a nice reverb to glue everything together and make the notes linger (not too much until it gets muddy though) would elevate the mix significantly. Reaper's stock reverb is not very good, there are good free one like Dragonfly Reverb, MCharmVerb or Valhalla Supermassive (not a true reverb but it has some reverb presets that sound close enough).
Kudos for the score though, it was very impressive.