1 - O Universe - I love the use of mixed synth and orchestra textures on this track. All the sound effects are very high quality and add a ton of atmosphere.
2 - Out Of Curiosity - The intro of this track is very open. It works as a great theme for exploring a new world. Also kinda reminds me of Penguin Cafe Orchestra if you gave them access to modern music making software.
3 - One Once One - The only words I can think of are "hauntingly beautiful" I'm always a sucker for music box led tracks, and this one is no exception. The dynamic of emotions that this track brings is impressive.
4 - Odd Ode - I see what you mean by each track is open to interpretation. This one sounds simultaneously at rest, yet still soul searching. Like you came to a conclusion, but that conclusion is that you are uncertain and that's okay.
Overall one of my favorite OST's so far. Great Work!