We reached an important milestone - the campaign mode is finished enough that it can be played through from start to end, and has been sent to our group of testers!
They have a few weeks time to try it now, while we work on further polishing things and incorporating tester feedback in the meantime.
Having people test the campaign is very important. We have worked on this for so long and know the game inside out that we have no reliable feeling for its difficulty anymore… the early feedback so far is that even the first few easy scenarios are quite hard, so some more tweaking will be necessary!