Bugs:
* It's easy to get stuck on the rocks while trying to enter the hole
  leading to the ladder at F,0.

Nitpicks:
* Difficult to see letters/numbers in the dark spots on the command map.
* Submarine's exit from the sub pen is too obviously shortened.
* Ladder at L,5 shows ladder hint if you jump while on the wrong side
  (and you can kinda-sorta climb it.)  A small clip brush right behind
  the ladder brush would probably fix it.
* Well at B,10 intersects terrain surrounding it, which is kind of awkward.
* Radio at B,9 has no antenna
* Very slight crack in terrain at E,5, intersecting eastmost barrel (only
  visible on east side)
* Very slight crack in cave wall at E,4, visible from north side--worse than
  the one at E,5 because the sky can be seen through it (so it's visible
  without r_clear 1)

  I'm not sure whether there's much you can do about
  the cracks, because they're probably caused by rounding error inside
  the renderer.  You're the experienced mapmaker, so you should know
  better than I.  ;)
* Topmost step at G,3 (right stairway after entrance to temple thing) is
  a little awkward if you hit it right at the chip (it slides you to the
  right before you walk up.)
* Staff pedestol incline slows you down too much (a clip brush with a
  slightly more gradual incline surrounding might help.)
* Behind the staff pedestol, where the narrower section begins, it's
  easy to get caught on the sides...  also, if you walk into either side,
  the game tries to walk up the slope (and fails) instead of just behaving
  like you were running into a wall.  It's up to you to decide how important
  this is, but it seems like a good place to camp for the defense.
* Lone, textured polygon at A,2.