Select block sets from the left panel and drag them onto the game board to form a row of four identical blocks, either horizontally or vertically. You can rotate each block set by clicking on it to adjust its orientation. If none of the three available block sets can be successfully placed on the board, the game ends.
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Using your mouse or touchpad, pick block sets from the left panel and position them on the board to create lines of four matching blocks in a row, either horizontally or vertically.