Drag and drop pieces onto the grid to make vertical and horizontal lines. Full lines disappear from the field. Plan ahead: the more lines you clear at once, the more points you get. If you place a flashing piece onto existing ones, they will also disappear.
The very root of your writing whilst appearing reasonable initially, did not sit perfectly with me personally after some time. Someplace throughout the paragraphs you actually were able to make me a believer unfortunately only for a very short while. I however have a problem with your jumps in assumptions and one would do well to help fill in all those gaps. In the event you can accomplish that, I would surely end up being amazed.