It's like Splashback, on crack!
http://www.wellgames.com/free_online/dropz/?r=m
If you pop three dropz at once, you get a bonus. You sort of play against other people - you can see the other person's board. If you complete the level before they do, you get their points. If you complete it and they don't, you get their points. If you don't complete it, you can try again. Level 22 has been kicking my butt forever.
Damn it, Gamp.
I stopped after a while.
I finally kicked level 22 to the curb.
Level 23 sucks.