Starting Bubbles: 25
Recommended Potions: +3 holes in the ceiling, +7 bubbles in the starting cauldron
Points needed for 1, 2, 3 Star: 100 000, 150 000, 200 000
Special bubbles: Spider Bubbles Mystery bubbles
Start out the level by clearing out all the Spider bubbles, stop clearing out the Spider bubbles and the ceiling when you have 8 holes in the ceiling. Then Start shooting Mystery Bubbles. When you have as many green Spiders you can get or when a Bomb is counted down to one or when your bubbles in the cauldron are down to only one, break the ceiling.
Here is a 3-Star-video by Jorge Valenzuela Meléndez
Here is a video with nine Green Spiders.