I'm very glad to hear that most people manage to solve it (eventually) and that there are relatively few new bugs. And I
love all of your positive comments about the visual design! That did take quite a bit of work
I'm going to get a quick bugfix release out and then I'll start working on better sound effects for the sendificator. (Along with the next map in the series, of course.)
The idea BEARD! and soad667 had, to send multiple cubes at once, sounds very intruiging. I need to think about that. However I probably won't allow the player to transport themselves, since that would seem an illogical thing to do. You'd get your butt fried off by the deadly laser 
KennKong wrote:
I spawned without a portalgun. Did I miss one lying around?
No you didn't, you're supposed to have one from the start. The reason that didn't happen is probably because of my assumption that everyone will have the standard vscript files, in particular "sp_transition_list.nut". The map list in that file is patched (in RAM) when the game loads, in order to give the player the correct portal gun and also to make sure that it transitions to the next map, once that is released. It looks like I'll have to think of another way to do that, that doesn't rely on external files so much.
(By the way, I find your mod template structure very useful. I now have a separate folder for my development stuff, and another one for all downloaded maps. It's super organised!)