You may want to take a look at the example called “Roaming Ralph”. If you are using the Windows version of Panda3d it can be found in this directory along with all the other tutorials: C:\Panda3D-1.2.3\samples.
Roaming Ralph is third person, but you can see the basic idea of getting a character to move on a terrain with the keyboard.
Building a dungeon is basically the same thing, just make the dungeon in your poly modeler, load your player model and dungeon and point the camera at it.
Currently, there are no tutorials for the specific game you are looking to create. What we have to do is look at all the tutorials and manual and see if we can apply/adapt the principles contained within them to our games.