When part of a falling block hits an obstruction, the unobstructed portion of the block will split off and continue to fall. More points are scored by creating the largest number of squares during one "timeline" sweep. Increasing score multipliers are earned by repeatedly clearing squares on consecutive timeline sweeps. Bonuses are also awarded by reducing all remaining tiles to one single color or for removing all non-active tiles from the screen altogether.
Occasionally, a block falls with a special square of one of the two colors with a "jewel" in the center. This square, when cleared as part of a matched 2x2 square, will cause all individual blocks of the same color that are horizontally or vertically adjacent to the matched 2x2 square, or to an adjacent square, to be cleared without score. These can be used for both generating large bonuses, since generally several blocks of the other color will be formed once these are removed, as well as to help the player recover if the field becomes too cluttered.