I just checked and saw that I have been playing this game nightly since 2008!!
Way back then, I downloaded the most difficult of the games to add to the already downloaded games.
I have almost completed all of them apart from one game entitled 'Elect-Tile' which I think comprises 750 tiles.
I have played this game for about half an hour each evening since 2008 and the nearest I have got to clearing all the tiles is 162 remaining.
Are any of you Boomers as hooked on this as I am and, have any of you managed to clear the 'Elect-Tile' game completely?