Really cool progression with these tracks! They really remind me of other soundtracks in a good way, I could totally see (hear?) these in a movie or an actual game.
Blue: really love how it morphs from the ambient, undefined intro to the clear piano melody, then adds some accompaniment
Dive: Great usage of sound effects, a really adventurous tune! Percussion gives the sound of gold coins clanking together which reminds me of treasure hunts and other lost childhood memories
Wave: keeping the energy pretty high with a sort of calmer "Under The Sea" vibe which fades nicely into...
Flow: We're getting a bit deeper now. It starts off a little menacing, but once the melody, especially the (steel guitar?) kicks in, that sense of coral reef exploration is made really clear. The choir reminded me a bit of the Moana soundtrack, but that could also just the atmosphere (or lack thereof haha) talking
Sink: Keeping up the energy, but adding a little hint of mystery
Deep: starts off with ambient sounds that trigger my Subnautica PTSD, and then goes right into a pretty dark melody which would fit right into Jaws, eventually breaking into something more hopeful, more in line with Pirates of the Caribbean for example, ending on a more strenous note; we're not out of the water yet...
Breathe: calm and beautiful. I'm a sucker for good piano, and this (as well as Blue) has some really nice piano in it. Ending on a breath, which makes sense for the title... If I were to nitpick, the breath sounding a little... interesting... but other than that, solid track
Overall, really good stuff!