Well, there are columns in the game that can move if pushed by the player's finger; without any external impact, they stand still. Let's turn it topsy-turvy. After that, the columns always move down. Being infinite lines, they have various speeds, so a stream of tiles is not regular. A player can stop any of them by touching them. How can such a bizarre concept be turned into a real game experience? Everything is simple: the player should apply the brakes to each column at the right time so they assemble a tile sequence. An automatic align procedure can be developed. It looks like slot machine mechanics, but it is not based on fortuity alone; the player can see the flow of tiles and choose the right moment to tap the screen by himself. We call this mode Moving columns.
As soon as all columns are stopped, the roll call function is called, and after that the game operates like an ordinary match-three puzzle: sequence outlining, point counting, element eliminating, and so on....