truth is, i have been playing for a while. in the beginning, just do your best, as you get towards the top, try to eliminate a color...the color will never come back. (sometimes, you have 2 blue bubbles left...they are together, you have a blue to shoot BUT another blue one on deck...you eliminate the blue, then start a new one--it sucks).
to increase your score, when you get down to say 2 colors, screw around. i just finished with yellow and red. got all the yellows and screwed around with the red...a WHOLE screen of reds show up...one click and done.
as you eliminate a color, additional rows are added...to increase the difficulty.
a great game.