Godd, but can be improved
I loved the gameplay style, I have never seen that sort of thing before. It was pretty intuitive and fun.
The only things that bother me about this game are the graphics and the slow speed. You could have improved the graphics a bit, make a few backgrounds, and switch them when the levels changed, as is usual with this sort of game.
The gameplay was too slow. It would be excellent if you could make it a bit faster - even the "round 1" text took too much time to go down the screen! =p
I think that could be solved if you made the bubbles move faster and kept the player's bubble string shorter, so it was easier to control.
I look forward to your next games!