Vicki's Tips - Level 2-9 Never lose sight of what coloured balls are attached to the bombs. Concentrate on removing the bottom half with the black balls and the doom balls so you can see the top. Keep a look at the amount of balls you have left. Once you get down to 10 or 12 you might as well clear the balls near the bombs because you only have 10 shots left anyway. If you clear a bomb before you are ready, try and cover it up to deactiveate it.
The image below shows you one example of how the balls connect to the bomb.