It’s on his twitter account.
Some of my favorites:

This pic was taken for an interview in 1994 while making DOOM II. Jay, Adrian, Bobby, Kevin, John, me in front.

This original DOOM II box cover was painted by Julie Bell. The Cyberdemon didn’t look right so we switched to BROM
I would normally link to the jdsobox stuff so you can check out Doom in a browser, but Oracle has successfully screwed up Java so badly that it’s a nightmare to get any 3rd party applets to run.
I suppose as a consolation there is a javascript version of DOSBox, jsdosbox.
And it has DOOM!
While we’re linking Javascript versions, http://kripken.github.io/boon/boon.html is a Enscripten port of PrBoom (itself based on the original Doom code) running the FreeDoom assets. I’m looking now to see if the doom demo wad can be hooked up to it easily.
In boon.js I see this:
new DataRequest(0, 281020, 0, 0).open(‘GET’, ‘/prboom.wad’);
new DataRequest(281020, 17940848, 0, 0).open(‘GET’, ‘/doom.wad’);
So I imagine if you scoop all the resources it should be easy enough to get it to load up the original WADs.
jsdosbox just got an update. Speed increase and firefox compatibility. It has been educational (and annoying in extra measure) figuring out some of the quirks of the javascript engines.