Looks good. The movement could be slightly..."smoother"...but that is a minor issue. I think the only real problem I noticed was how un-steady the shooter was due to tilt aiming.
I think it's a good bubble shooter, but there are a lot of ways to truly stand out from the pack.
Why not add rainbow "wild card" bubbles to shoot, that will automatically become whatever it needs to be to get a row, along with perhaps enemies that move around the screen and deflect bubbles (do that with simple, slow levels, with an enemy of a certain color playing interference. It will deflect all bubbles that arn't its color that it hits, forcing players to not only aim well, but time their shots. If you hit the enemy with a bubble of it's color, it is vanquished.
You can add LARGE bubbles (either on the level or that you shoot), as well, to make things really tough.
And maybe a "spear" move, usable only once per X points or X combos, that will pop everything in front of it in a straight line.