I have only just started playing the game. The music is pleasant and relaxing, and the sound affects are actually appealing. I don't like bubble shooter games where mother pandas or cats or whatever cry hysterically over their babies trapped in bubbles. There is none of that whatever in this game, so I am pleased.
Lots of people seem to have complained about the ads, but so far, I don't see anything to complain about. They are not lengthy, and they are often just a half-screen shot of a game, which you can ignore. I don't see a single thing to spend real money on, so it's only fair that we view a few ads in exchange for playing the game. So far I have not been forced to watch long video ads.