Fantastic!
One of the single most challenging puzzle games I have played to date. Very well done in both design and concept. As for the review below me by fucian, Flash Player 10 is not a virus. It is created by a legitimate company (Adobe) and was successfully installed on many systems, including my own. Some anti virus programs read both flash software and flash programs as viruses, even if they are not. As far as Windows Vista is concerned, it is a waste of talent on Microsoft's end, as it is the worst Windows operating system to date. ANY gamer will tell you that. Try using XP. It's more reliable.