Two stars
Charms: Precision
Potions: Extra ceiling holes; and Rainbow bubbles
Continue to clear the way above the skulls, working quickly to beat the infection. Drop the skull chain, then pick a side to clear, which ever one has the most of the same color bubbles will be a wise choice.
Shoot as high as you can to drop globs of bubbles that contain the bombs. Clearing both sides will show you the ceiling
...and the rest is just history!
