Some wonderfully ambient pieces here. As others have said, the minimalistic approach is really a boon with this type of stuff. Being able to evoke emotion and set the tone with choice instrumentation and voicings is a skill. The less is more approach is difficult to strike properly but when it works, it really works.
RiverFX's pieces are gorgeously ambient and spacious. Never quite on the nose and instead blurring into ambiguity - another difficult technique to use properly. They do a wonderful job of creating these intricate textures that are so easy to get lost in and richly detailed.
Ribboncable's pieces, by comparison, are ambient but a little more direct in their storytelling. They feel more akin to typical arrangements. They're layered really well and I really dig the choice of instrumentation in these. Soft, subtle elements throughout each track that never busy the mix too much.
Finally, Jadin's pieces are more in the line of soundscapes for me. They're still telling a story but it is through the collection of the various sound-design elements. Melodies and progressions are present but are obscured through clever use of post-production and droning - granted the bell-like melody in a world that once healed is pretty prominent, but the point stands!
All in all a great collection of tracks that all function really well as underscore. I like how each composer has some definitive tells but as a whole the pieces work together. Great work you lot!