Thanks for the kind words cnico88 and sensboston
We're really happy that you both enjoy the game! We just released our first update, which adds over 50 new handmade "bubble stages" (several phone screens worth of bubbles) for more variety and replayability, a new power up: wings, and more background art. We're hard at work on our next update, which should include (amongst other things) a much needed global leaderboard.
@sensboston: thanks for the music suggestion! We tried out some license free music loops a while ago, but none seemed to fit right. However, we will definitely reconsider it after this feedback!