I don't really understand why this one is so popular. I've seen it all over the place and it keeps getting linked to. But I just don't see why. It quickly becomes guess the right angle to shoot at and there's no real puzzle to it. It also takes way to long to become a challenge.
But, perhaps you're like the others who have linked to it and like this sort of game. If so, play Gravity Pods at wickedpissahgames (maybe it's the name of the site that makes it so much fun for people?)