I knew about the 2:1S1E one, I think that was possible from the very start, only needing one snake! I've moved the open red door to (21,20) to fix it.
I've replayed 3:En the way you said.

I swear I tried that ages ago, but could never pull it off the first time. (manipulating the goblin around the circle to be above the golem). Mabye I was better off removing the whole golem bit, since adding all the extra stuff makes it easier to tell that it's not the correct solution.
I was gonna post a new update today with quite a lot of changes, but I'll just go and fix 3:En first - and I'm taking a different approach this time, instead of messing around with the top bit, I'm changing the lower area.
Oh, and I'm glad you liked the story
Edit: Another rather interesting US to 3:En is using the snake at it's full length to block the goblin following you immediately. It requires a little bit of timing, but is a completely different approach to what anyone else has done.
Edit: I've just found so many more unintended solutions where you kill the snake immediately, place the golem in a certain location, and move back through the bottom trapdoors to make the goblin follow you (but about 8 squares behind)
[Last edited by da rogu3 at 05-01-2011 11:25 AM]