O Universe/The Unibirth: The bubble SFX and instrumentation sells this perfectly for me on the theme. Cool vocals and the rhythm towards the end.
Out of Curiosity/Reflections: Vibes. Brilliant panned SFX.
One Once One/Burst Into Worlds: Loving the progression. Lovely instrumentation!
Odd Ode/Lonelibless: Ooh that piano. A sprinkle of Lydian here. Such a satisfying conclusion to the OST!
Great work!