A Bubbly Feeling - the progression reminds me of Radiohead’s Creep. The B section at 2:42 and then the jazz cymbals after are really nice.
Even if Just for a Moment - this track is really touching and the push and pull of the tempo is perfect. Reminds me of Omori. This one might be my favorite!
Welcome to my World - wow the contrast between the huge choir and the filtered underwater section is really beautiful!
I’m not sure what you envisioned for your game, but it would be nice to hear some kind of battle theme (btw, you can still edit your page description to describe your game/story). Overall, a charming soundtrack with great emotion!