I don't often have much to say in these forums as A) I'm rubbish at the games and B) I've never developed anything in my puff! However, I feel compelled to post just to say well done on the release of 0.6.
Having proper structure in the single player campaign is a real boon and all the tweaks and updates since the last release are all (at least for me!) for the better.
Again, well done. And thank you for sharing all your hard work with all of us.