unfortunately, i had 'c' bound to impulse 9 and accidentally hit it during my first run which screwed everything up.
when i played the second time, it was a lot easier, but i think i would have been ok the first time.
i realised a little late what kind of map this was. i wasn't really conserving ammo at the beginning, but i thought it was pretty cool. the ring saved me a crap-ton of ammo and work though, basically allowing me to bypass 2 ogres and the fiend, and making the final 2 tarbabies easy as well as the last vore.
the ending with the two doors was wierd though... it was like "oh... ok, if you say so..."
anyway, yeah, i found it a tad dark at times, but i play with a crt so that's probably why. but aside from the dimness, the lighting itself it well done. nice subtle colours (except for the last two doors 9_9 ) i liked all the exploration too. it wasn't a big deal to backtrack either, for health kits i saved and such. although that 1 secret is annoying, and i was able to get the armour by jumping without going into the secret itself.