Grab a potion and flick it at the glass. A gentle flick lands low — a hard flick sails high. Hard throws scatter more, so aim with care.
Match the color to shatter the whole vein. Wrong color cracks it; cracked glass breaks on any hit.
Shattered glass sends essence flying back into potions of that color — watch them fill. A FULL potion explodes on impact.
Flick through a hole to hit the layer behind for double points.