Object: Cover all target squares. 
 
First click anywhere on the board to start a random setup. Zillions will drop eight Dominoes.
 
Click a Domino to rotate it ninety degrees clockwise.
If this is not possible because the target square is not empty, then the Domino will rotate 180 degrees.
If this is not possible because the target square is not empty, then the Domino will rotate 270 degrees.
After the rotation the Domino will slide as far as empty squares are available.
If after its rotation and sliding the clicked Domino has another Domino 'ahead' of him, then this second Domino also will (this time automatically) be rotated and slid. After this it's your turn again.
Note that this rule does not exist in the games 'Domina' and 'Domina II'.
 
You win if you have covered all target squares. The target squares are marked with orange dots.
 
The other variants have other target squares.
Of course you can also invent your own variants by rearranging the orange target dots!
 
 
More freeware as well as real puzzles and games at my homepage http://karl.kiwi.gen.nz.