here is a small collection of DOOM 1 levels that I made long ago.Before I evolved to quake.
sat.wad is the 1st episode, it sucks.
niftylvl.wad is the second episode. It has some of the better levels I have made
the e3mx ones all contain bosses. It was gonna be a boss lvl episode. But I stopped dooming b4 it was finished. E3m6 has an exit, but no way to get to it yet, the lvl was never finished.
NOTE: DOOM will not load all of the e3 lvls at once, dunno why.
NOTE: you may need ultimate doom to play a few of the E3 lvls.

some tips if you get stuck(alot of secrets that I know about)
these are discrete but if you get there you'll know what I'm talking about.

e2m1: you'll want that bfg later, find the switch to get it
e2m2: go to door #1
          dont grab the 1st red key you see
          pass through the green torches
          find the secret door near the beginning
e2m5: blue key is near the blue torch
e2m6: CROSS the threshhold
e2m7: dont pass through sensors
          dont hit floor panels
          deactivate all computers and mainframe
You can do the rest on your own. These levels are FILLED w/ deathtraps.
There's all sorts of bugs too. So don't email me about them. 
But if you feel I must be bothered: it's brownroe@aol.com, but I'm changing it soon.