Tile-o-fall

Tile-o-fall is a game mode that is relative to the Moving columns that features some new ideas. The tiles are falling down like a waterfall and move with equal speed. Figuratively speaking, the columns are individual water flows. They cannot be stopped by a tap, but the player may interrupt a flow by touching it; this means that all tiles found above the finger are stopped, but the tiles below fall down, exposing some content underneath the column (imagine you put a flap inside a vertical water pipe and see its walls). The underlying content consists of tiles as well; it can be static or dynamic, featuring elements that move horizontally. So, there are two layers in the game: a foreground, which moves vertically, and a background, which lies under the first layer and moves horizontally (or stands still). Here is the idea: the player breaks columns, trying to find useful tiles, which lie beneath. Once the tiles are aligned to each other, the roll call function is called and the...