Right and Left Clicking

Flip solid tiles by left mouse clicking.

Flip and activate ghosted tiles with right clicks.

Flip and deactivate solid tiles with right clicks.

The above screenshots show my attempts at making a coherent way of both flipping tiles and activating/deactivating the tiles. 

Solid tiles flip when you click on them.  Nothing happens when you click on the ghosted tiles.  Right clicking either activates (turns to solid), or deactivates (turns to ghosted) the tiles. 

There is still an awkwardness to the two different controls.  It's a little bit confusing, even with the knowledge of which click does what.  It might be enough to give some visual feedback when you hover over an activated tile.  I'd like to try adding a brightening effect when you mouse over an active tile. 

It's also possibly that having the tiles flip over as well as fade in and out is part of the confusion.  Perhaps they should simply fade in and out.