Hi, thanks a lot for the thorough review and for checking out the project's page too (not too many people have done so recently as it seems, so it's great to see it being noticed) !
The various things you have noticed are pretty accurate to what I intended (influences, story/gameplay intentions, instruments used...) so great job picking up on that !
Raging Sea is actually fully in 4/4 with a 140BPM tempo, although I used triplets on the slap bass parts to give it a bit more variety and tension to the rhythm.
For Aquatic Perserverance, I indeed intended to give it more energy for something more dynamic on the gameplay front, similarly to the end section of Gris when you're dashing through water sections compared to the slower pace of the game before reaching this part (I still wish they did more with it in Gris because the gameplay finally gets a great flow to it until it suddenly ends 30 minutes later, oh well).
Anyway, thanks for listening and checking out the project, and glad that you enjoyed it !