Pretty Blocks

Pretty Blocks is a game with many similarities to Columns. The game takes place inside a tall, rectangular playing area, as in Tetris. Columns of three different blocks appear, one at a time, at the top of the well and fall to the bottom, landing either on the floor or on top of previously-fallen "Columns". While a column is falling, the player can move it left and right, and can also cycle the positions of the symbols within it. If, after a column has fallen, there are three or more of the same blocks connected in a straight line horizontally or vertically, those blocks disappear. The pile of columns then settles under gravity. If this causes three or more other blocks to become aligned, they also disappear and the pile settles again.