I like the chill music and the particles effects. I think you nailed the type of hyper casual game you were going for. I think having explosive bubbles and a constantly changing color of bubble to avoid is a good way to keep the player engaged.
If I had to critique something it'd be the UI and colors. Some of the text is misspelled and clipping and certain things aren't centered. I'm terrible at making UI's so I'm really just nitpicking with this >_<.
I do think a stronger color palette could help this type of project though, the colors right now are totally fine, don't get me wrong. I just think a strong palette could help the over atmosphere and give a really cohesive feel.
Nicely done with this though! It's cool that it works on mobile