Interesint Concept--but could use more.
I love the idea of using a bubble-poppey game with Flash... ^^ It was fun the first couple of times, but they really don't retain interest for very long. You could add in a storyline or something about a Bubble Kingdom or something--that would definitely make it more interesting. ^^
The bubbles sometimes also popped at random, whether or not I was touching it with any part of my upper body (I was too lazy to actually get up... XD) you could work on the sensitivity of the bubbles, but still, a good basic game. ^^