there is a game like this on the iphone but it also takes into account how much you are tilting the iphone
(hold it on its side and they will tumble unless its the way to finish the level which it sometimes is)
not that that would be possible on a flash game (who's going to tip there screen upside down for a small flash game?
i got down to 13 blocks left and a block from way down near the base poped out and then everything above it feel down to fil he gap but the first piece to fill the gap spun a little and sent the whole to flying....