First screenshot uploaded
I've added terrain now and it looks much better than when it was just two colors, gray and teal. It's not exactly artistic, but it's good enough for me.
The gameplay still needs a lot of work. The only building I have so far is the shield generator shown here. I'm afraid it's going to be a fairly bland RTS as far as building stuff goes. On the other hand, I'm very happy with the navigation system I've got going, and I've got ideas for a cutscene or two that I like.