Welcome to my guide to the PC, Xbox 360 Arcade and PlayStation Network game Penny Arcade Adventures: On the Rain-Slick Precipice of Darkness: Episode One. You should be able to use it to help complete the entire game from picking up your rake right through to the thrilling other end of the episode.
This guide is primarily based upon the PC version, but if you are playing on the Xbox 360 or PlayStation 3 everything is just about identical except for the controls. I'll let you work those out for yourself.
There is also a guide available for the newly released Episode Two of the saga.