Very nice work! One suggestion for a small feature - it would be nice if the screen where you select a level showed your best (lowest) number of moves for levels you have beaten, and once you have beaten all levels, showed the total moves for all levels.

The point of this is that I could then send this to my brother/coworker/arch-nemesis and challenge them to beat my score (as with the old Flash game "Magic Pen", for example).

This requires Flash. Is there any chance of a html version?

Thanks for such a fun game!

interesting, what framework was this built with? unity?