Before time runs out, you must burst the purple bubbles (which gives you points) while avoiding bursting the gray ones (which costs you points). Ice floes ravel on the screen but are there only to disturb you. Especially how the purple bubbles move at a tremendous speed which it would seem almost impossible to touch one of them! Keep calm because it is very easy to fall into a negative score!

Use the mouse.
Pop the pink balls and nothing else or you lose points!