Looks like I have 2 new people to follow. It's awesome to see ppl playing with the raycaster. Keep up the good work. I aspire to be able to fiddle with that at some point.
I would imagine you can implement them as objects with an X and Y location on the map. I'm not sure if the raycaster works with Z offsets, but if it does you could probably set their Z offset relative to their distance from you, so that they appear behind walls properly, etc, only rendering those within your point of view, of course.
I'm not sure how you'd handle pathfinding/clipping/AI, though.
As long as he recreates the sprites by hand he is technically okay.
I cant tell if the people screaming for keys are being sarcastic after that one comment, but they are bloody annoying.
The correct series would be Wolfenstein, right? As long as the published release does not include any copyrighted assets, such as visual elements and official level layouts, it should be fine.