This is my first attempt at a casual game in Flash. It is a lines game with unlimited undo. Try to make lines of at least 5 marbles with the same color to make them disappear. You can get a lot of extra points by clearing more than 5 marbles at a time.
Use the Left Mouse Button to move the marbles (click on a marble, then click at a destination).
Press [Backspace] to undo.
During the game, you can turn sound off or on with [F4].