Too confusing. There was only one gold bubble and I didn't get hit at all, but I lost. It makes no sense. Good idea, though.

I like the idea of this game, but there are a few things that I think you should fix:
1) Try to make the movement of the player move smooth. When the bubble is moving jaggedly, it is difficult to avoid the enemy bubbles.
2) Also, make the collision boxes a little better. There were many times as I was playing I had to retry the level because I only got close to the enemy.
3) Can you make the bubble go to where the mouse is faster? Because the bubble slows to a stop to where the mouse is, if there is a golden bubble or heart at the edge of the screen, the player's bubble will take a while to get there.
4) The ranking system is a little unfair. Basing the rank for each level on speed, with the difficult controls make it close to impossible for one to achieve three stars without luck and excellent timing.
5) Speaking of stars, is that picture a star from Super Mario Galaxy? I'm not sure if it is or not, but if it is, you should probably use a different pic. Try making one of your own.
6) This last thing is more of an extra: Make the buttons more "interactive." When the mouse moves over a button, have it change color or shape to show that the mouse is on top of the button. Do the same thing when you click the button.
I know that this has the potential to be a fun and quite addicting game, so stick with it and try to spiff it up a little more. The design and music of the game is good, so all you must do now is change a few things. After that, I think you'd be good to go!

Good concept, but the jerky movement is a pain.

This game is laggy, unresponsive, and poorly constructed. The bubble follows slowly, the objectives are often inaccessible, threats appear impassible around objectives, and the final objective moves erratically and is impossible to predict.

The enemy moves too fast and the bubble I control moves too slow.