Pfactris
An Arithmetical Tetris Game. Numbered tiles divide and cancel out.
Full documentation: Download pfactrisX.Y.html
Tetris, but with arithmetic, each tile has an integer on it.
Drop a tile onto a tile below so that the numbers divide and cancel out.
Once a tile drops and cancels with the tile below,
it will attempt to cancel the next tile below that and so on.
If no more below-cancellations happen it will also try to cancel with the tile to the left and then the tile to the right of it.