Excellent little widget. Superb presentation, nice animation and a good, neat size: not so small as to be fiddly, but no bigger than it needs to be.
Only two negative comments:
1. The ghost showing the squares in which you can place pieces occasionally fails to show up.
2. The game is too easy. I can beat it just about every time even on the hardest skill level. At least one even harder skill setting would be useful.
Overall, though, an extremely nice widget.