This game is not really amusing as a free game, and I'd be irate if I'd paid for something this crappy. 15 bucks will get you a month of World of Warcraft, which is way better than this crap.
The guards shouldn't be working - they definitely would qualify for disability by being severely retarded. However, guard work is suited to these special needs individuals as they are immortal. These two factors really drag down the gameplay.
I like how realistic the choices/consequences are. Usually game programmers try to trick you, and the best survival choice leads to your doom, but such is not the case here.