Two points off:
I liked it overall, and it's exactly what it claimed to be. There's only two faults with this game:
- It's possible to accidentally lose pieces off the side. I lost two this way, and didn't see any way to get them back.
- It could use something in the audio department. I'd suggest you go over to the Audio Portal and look under "ambient" music. Everything there is free to use as long as it's mentioned, and it would fill the dead air. Of course, leave an option for it to be turned off/song changed, but it would be a nice feature.