That was the worst level ever. I hate stealth levels.
The boss battles were pretty easy, actually. You just had to move, because the AI couldn't lead you at all. The hardest parts for me were the rest of it.
I, too, have fond memories of Wolfenstein 3D. I was older than six, though.
I hope to play the new version on Thursday, as soon as I'm done getting drunk after my massive, three day qualifying exam.