Comment by DamnInteresting

> I wondered if you were working to assure there is only one solution; from today's puzzle I see not, since I found "another."

In a perfect world there would be just one solution per puzzle, agreed. But the pool of possible puzzles would be so much smaller.

> It would be great to be able to start over.

Agreed, I think I'll add a "reset" feature that puts all of the tiles back in their starting positions (and allows replay if the puzzle is already solved).

> It would be great to keep track of how many distinct solutions you have found. / It would be great to know how many solutions there are.

Something like "you've found X of Y possible solutions", perhaps? Not a bad idea.