Finally got around to trying it out. The game is great! When I was a kid, we went to visit a friend of my dad's, and they let me play a game on their computer, it was one of those IBM games, a sidescroller in which you controlled a soldier and had to shoot enemy soldiers (it wasn't Contra, it was older). Duga reminded me of that game, but in first person! :D
A couple of things I didn't like though: enemies seem to be able to shoot me through walls without technically even seeing me. I'm not sure if it's a feature or a bug, but something to look into, I think. Also, the game could really benefit from level statistics, automap and some secrets (though I suppose with procedural generation, it'll probably be difficult to implement properly). The reloading is annoying, and neither Doom nor Wolfe had it. Otherwise, it's pretty solid. Can't wait for graphics mods to come out to make the sprites just a little more well-rounded. :D