Golden Spiders doubles the amount of points you earn when a bubble bounce in to it. If you know you are going to drop a lot of balls when not all spiders are yellow, you should look to find an easy shot for the ball that follows. Before you drop the balls. If you are fast enough the shot after you drop the balls will still turn blue spiders to yellow while all the other balls are still bouncing. Sometimes you can get three extra yellow spiders before the main drop disappears.
Green Spiders are the yummy one. They doubles the falling bubble, so you get twice the amount of point by bouncing in to a green bubble. Green spiders seem to fall on the opposite side of the 5th cluster. The green bubble become blue after a while, a spider seems to remain green for a maximum of five seconds.
And… There is more!!! :D We already know how to get green spiders!
Points for Spiders by Jorge Valenzuela Meléndez
Blue Spiders -> 25 Points each bounce
Golden Spiders -> 50 points each bounce
I have an additional tip for you on spiders. You need five consecutive shots to get a green spider. Also you can never have more than 10 spiders. If so you may have to drop a shot to make room for your green spider.