I really enjoyed this! (Finally got around to playing it just now, it's probably been sitting on my desktop for months...)

Nice old school feel, interesting layout, I liked the fact that you were revisting areas from above (and also appreciated that there was always a new lift or staircase to get me back up if I fell down). I was never lost and always knew where to go to progress, but at the same time it didn't feel overly linear or predictable.

Combat arenas and monster placement were very good, there was always room to fight with adequate cover and movement options... as a result the ambushes were fun and never frustrating (the combat after picking up the gold key was a high point, it was an intense moment but not unfair). Similarly the end battle was very well done, it got the adrenaline going and was a fitting end to the map... I just scraped through, but had I died I'd have been blaming myself, not the map, which is always a good sign.

Item placement was also good (with the exception of the lack of armour outside secret areas). I had a decent weapon selection and enough ammo to get the job done AND have fun (didn't have to be super conservative). There was enough health, and it always seemed to be in the right place when I needed it.

Minor complaints (just nitpicking, none of it matters much):
- lack of any ambience was a bit odd in some parts, particularly early on (remember, most of us don't have music so no sound at all is weird).
- some monsters (just a couple) were placed in a way that made them ineffective. Nothing abnormally bad, just stood out because the rest of the monster placement was excellent.
- lack of armour on the main path. If I didn't get the RA before the last big battle, I'd have been royally fucked!
- lighting was not amazing (it wasn't bad, but a little more time spent on tweaking the lighting might have paid off).
- I got stuck once and had to noclip out (behind a button, not a lift, need more testing for this kinda stuff though).

I played on normal, and it was challenging but beatable on the first run (exactly as it should be). 29 minutes, and I missed 1 monster and 2 secrets. I'll definitely play through again on hard and try to find the stuff I missed.

Thanks for the excellent map, Simulacrum. 

I just played this yesterday and thought I should say that I really liked it. Do you have anything else in the works?