Bug Report?
 

On level 2, I seem to have killed all the skeleton archers but the quest (and level) aren't completed. I killed some of them by setting off an Ice Blast outside their door before opening it - could this be the reason?

I can supply the save file if that's helpful.

It's possible that is what happened, even though I have code in there that is supposed to take that into account. Unfortunately, a save game won't help me in this case. :(

If you are really stuck, replaying the adventure should fix everything.

This should be fixed in version 1.001.