✥Drag the block onto the board. A pair turns when you tap it. On a keyboard: the arrows, R to turn, Enter to drop.
✦Three or more of the same that touch (in a line or a bend) merge into one of the next, and that one can merge again. Three sixes make a crown; three crowns blow up everything around them. A star becomes whatever makes the best merge.
$A five pays $1, a six $2, a crown $4 and a blast $6. The game ends when the block has nowhere to go.