After playing several maps by Peter Kucera I do have to agree with the description that this is the best yet by far. Great detail and gameplay all the way from start to finish. Although this was not nearly as bad as most in the ammo department so you don't have to conserve at all.

Throw a pipebomb behind the silver screen in the room with a picop and a liztroop, and then take cover, ideally outside the room before detonate. This will clear a way that leads to the red card.

The switch in the red card room is just below the rocket launcher. Once activated, rush to the door to the right of the room in the centre. A pigcop is the last enemy waiting for you there. The final boss somehow does not count as an enemy even if it is not killed in the end.

Can't open the door leading to the red card room. The switch in the dark room (think smaller)
is not clear.

I'm pretty sure I found the nuke button in the red keycard room somewhere. I think...

I'm stuck at the end. I got the jetpack and used it to be up the vents which lead to a bedroom with a screen, a pigcop and a liztroop. But then there is nothing to do there and I can't find any other use for the jetpack. Says I've killed all monsters, any idea?

Any the map is pretty cool because it's made in the style of maps from Duke It Out In DC, which is pretty rare.