Just finished it, took me 45mins and found 9/11 secrets. However I wandered around 10 mins at the end trying to find the exit. I loved the abundance of secrets.
At first I really liked the heavy unlinearilty of the map but at the end I realized it was a problem : apparently progression of the map is broken in at least 1 way : I reached the trainstation HALF-WAY through the map. The problem is that, the vent that you're supposed to go in only after having used the red keycard, can be accessible through the corridor if you destroy the plants in front of it and do a crouch-jump. You should have blocked that vent, or rather even not put an entrance to it through the corridor, because the ending of the map can be reached very early on that way.
Also when I found the 2nd blue keycard I still hadn't used the first one.
At the start of the map I got a little surprised : in every map I'm used to kill every alien outdoor before entering any building, but in this map there isn't enough ammo provided to do so; but after all it was a nice change of pace.
I liked how every single weapon is provided (including the expander).
What I also really like about the map is the many progression levels : through vents, rooftops, walking on electric wires, through underwater, through exploded walls, small paths where you have to crouch, entire SoS floors. This kind of stuff is everything that makes Duke3D what it is.
Here are a few random things on top of my head :
I loved the design of quite a few areas, especially that mansion (the one with the blue lock in) and also the nuthouse.
I liked the effect in the basement when you're stuck and the lights turn off one by one.
The newbeast jumping out of the closet startled me.
I didn't like the couple instances of invisible walls (at the beginning and at the end). Speaking of the end, the nukebutton is kinda hidden and hard to find (I didn't spot it at all although I went there twice, and had to ask for help); but to me that was actually a good thing since I found the place half-way through the map....
I loved the secret place accessible through the rooftop and how you have to use steroids to get there.
Loved the design in this corridor, can I steal it for my new map
?
Nice curtains
Here sometimes when you back overwater through the slope, the screen will remain blue as if you're still underwater
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Anyway great map overall, probably the best release of these past few days; however it's a shame that the progression of the map is broken due to that one vent.