Given the difficulty of the game, I decided to publish a walkthrough. It doesn't give away all the secrets, but there are some hints and a straight path through (not the shortest one!) if you just can't make it any further: http://popculturephilosopher.com/plexr-escape-walkthrough/
 "Buried Alive!"){kind=icon}
 "Plexr 2.0"){kind=icon}