Haven't done much else than this game last few days, and I'm still quite enjoying it. I do have a few snafus, but you've made a great game so far and its still in beta, so I will wait and see what you do. For what I know, you have changed things I'm playing on your current development version so much that my comments are outdated.
Although I would like a slightly improved windowed mode when it comes to the overview map. Direction keys would be nice to help scrolling, and make screen scroll before you touch the edge of the screen.