Fill out the area with bubbles. In Bubble Fill, your goal is to cover 66% of the playing field with bubbles, all the while avoiding collisions with the bouncing balls while inflating.
Click and hold to create bubbles to fill the area. Don’t let the bubbles hit the red balls while creating or they will burst and you will loose a life. Hitting the border or hitting other bubbles while creating will release the bubble and set its size.