The Castle Doctrine has two basic game modes; in one, the player constructs a sophisticated system of traps to protect their valubles, and in the other, they atempt to overcome the traps of other people. This was a solid game premis, but is unfortunately spoiled by extremely unbalanced and difficult gameplay.
In general, although the game effectively conveys what Extra Credits refer to as 'mechanics as metaphore', it would be nice if the game were actually fun. Unfortunatly, the game far too effectively convey's a sense of hopelessness, depravity, sadness, and poverty by essentially wringing the player for effort - one can spen hours building a good home, only to die and instantly loose everything. Or they can die over and over and over again trying to break into other peoples houses only to find that their princess is in another castle - I mean, that person didn't have any money anyways.
In summary, if you want a game that will make you feel sad, want to give up, or hang yourself in front of your children (and yes, that is an in game option), this game will convey those feelings with extreme prejudice.