I've rarely been more engrossed by a game, felt more respected as a player, or allowed to figure stuff out so much as in this game.
This is the rare game that requires the player to truly use inductive reasoning skills to reach a solution using given parts that seem not to be applicable to the problem at hand at all.
Inductive reasoning is very rare in games.
Get this for your children to help hone their reasoning and creative problem solving skills. And make sure to spend some time with it yourself.
This is one of the best entertainment experiences -- of any type -- that I have ever had. You will learn without instructions. You will teach yourself the rules and then the game will demand mastery.
Zero hand holding.
Extremely pleasant zen-like atmosphere.
Absolutely brutally difficult puzzles with real design-based challenges created purely by the contextual interaction of persisten rules. NO puzzle designer mindreading or artificial "challenges."
What are you waiting for? If you like thoughtful games at all buy this immediately.