OK, here's a quick, early idea for handling the units in the GUI. To be honest I don't really like how this one came out, but for making it better I could take a number of aspects and develop them in different directions, and that's the part I'd like to get feedback on.
In the second graphic, unit 2 is selected, 19 and 20 don't exist because the team wasn't that large, unit 5 is greyed because it already used some time units, and unit 8 got killed, which is why it is in red.
The larger buttons are of course for Tanks, UGVs, larger units, whatever.
As I said I don't really favor this design the way it is, but just about everything can be changed. This took less than an hour of work.
Edit: These are not to scale, if these were used in-game they would first be re-scaled!
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On a different idea, I've been thinking about a translucent GUI much like the mockups for other interfaces shown in the wiki. Something that glows and looks kinda like a heads-up-display, but still has parts that can be seen through. That would actually be easier for me to build, and if done right would look quite impressive.
I'm also open to other ideas, of course.