Arcade Lines Online by 2DPlay [zoom]
Click a marble then its destination - anywhere on the board that it has a path to, including turns.
Each turn you can move one marble to create lines of 5 which remove the marbles from the board. It sounds simple but is made challenging by the fact that more marbles are added to the board at random spots with each turn.
If you like this game, Blooming Gardens is very similar.