Hmmm, your unintended solution is actually not that tough, it only took me three tries to figure it out. I added some extra walls, if someone can do it now they deserve it! But as to adding a checkpoint within the orb section...well, you said "
in the first mimic chamber"
which doesn't make sense to me, there's only one mimic chamber. Do you mean the first passageway you go through? I don't think it's that difficult of an orb puzzle, and once you get the gist of what is happening you can go through it quickly even if you screw up and have to start over. I did have a checkpoint initially but it was in a place that you could accidentally step on the same move you screwed up, which doesn't help. If I had some really fancy footwork required, like Clayton's brilliant orb maze, then I would definitely have checkpoints. If you feel strongly about this room I can add one though.
Oh, and as for the force arrows comments...you said room 1N 1W, when actually you were referring to 1N 3W (remember, the Entrance is off to the side, not in the center of the square). When I realized that (since no where else on this level had an invisibility potion), I saw what you were talking about and fixed it. Yes, it's not difficult to get from one side of the other, but it is a matter of principle.
Thanks for the comments, if you have the time try to make it to the end of level 3 at least where I made changes to the serpent rooms you were so unimpressed with.
Game on,
____________________________
"
He who is certain he knows the ending of things when he is only beginning them is either extremely wise or extremely foolish; no matter which is true, he is certainly an
unhappy man, for he has put a knife in the heart of wonder."
-- Tad Williams