Levels :)

I am making a 60 level addon, called "Gerolf 3D"
does anyone have good tips for level designing? if so, let me know
if any of you want to contribute, and make a level for me, that would be awesome! i will put you in the credits of the game!
P.S.
i know this is off topic, but anyone else get snow??? down here in NC we got allot now

Paal Olstad has a detailed page about level editing at http://home.online.no/~p-olstad/wolfenstein/design.html .
There's also a helpful hint file available called WolfTips .

Well, I am just going to list a few basic things
-Make sure the level can be beat on the hardest difficulty level, starting the level with only a pistol and 8 rounds.
-Make sure the floor code in one particular room is the same, including a room divided up by static objects.
-Read... I think it's Warren Buffet's wolf3d level making guide. It's great.