Updated the game with the Spear of Destiny missions!
Some minor bugs have been fixed. Controller is more responsive now, no walking through enemies, load game bug fixed and enemy AI updated (no instant fire except mutants).

Alternative URL if the original link is broken due to bandwith limit.
http://wolf3d.atw.hu/

Play it online!
http://wolf3d.freebase.hu/

It's a great idea, and it has already occured to me. Unfortunately I don't know any artists who would do this for free.
The game engine can do much more than run Wolfenstein 3D. An RPG-style game would be a real challenge to create!