Well there's nothing better than procrastinating from homework so I had a look at your map, and as far as maps go, yours felt very original to me, I'm no expert reviewer though.
While I found it a fun map as you said, obviously if it was going to be a proper modern Duke map, it'd need to be a lot bigger and have details added to them (yours is pretty much completely lacking in things like decorative sprites, shading etc...)
but that's ok! it's a first map, what you aimed to do, you set out and did well. Small things like getting the red key card by pushing the buttons on the column making it come down was definitely Duke. You made good use of the jetpack and a onesided wall or two. Having the crack near the ceiling was fresh, I half expected it to blow up a tunnel leading down to the floor for the player to get up there but it works just as fine.
Now on the technical side of things, I had a look at your mis-functioning door, and the first thing I noticed was that the SE 11 was facing the wrong way, so I turned it around and blimey! the thing still didn't work! After about 20 minutes of fiddling (once again I don't like homework) I deleted the damn thing, and started an identical door from scratch, it's exactly the same as far as I can tell without the 200 speed sprite and the SE pointing the right way.
You also had a glass window near the nuke button which couldn't be broken (at least from one side) so I made it breakable as I'm assuming if you didn't want a breakable window there you wouldn't have put a window there at all.
And lastly, a handy button to know is the full stop . which when pressed on a wall in 3D mode makes all the adjoining walls with the same texture on the left side line up with it so it looks proper. Try it out in the first room for example and you'll see what I mean.
Here's the fixed door and window, I hope you didn't mind me tapping into your level, and keep up with your mapping, I think I speak for everyone when I say we're looking forward to playing nice beefier levels by you in the future.
http://www.sendspace.com/file/7r4jk0'&...com/file/7r4jk0