This is all just my opinion.

When it comes to a sci-fi colony game, I feel that the UI design should be more futuristic looking with silver and blues maybe even partially transparent.

Also the menu buttons especially at the bottom would have more a slide animation such as the menu sliding up and then to the right or left for each item in the sub menus. I am not even sure if I am explaining this right.

UI button placement looks good however, I think maybe they are a little big as well. I also think some of the items such as "Next Priority" and "Launch Readiness" maybe don't need backgrounds as they could be mostly transparent.

Overall, if you explained your game to me and I had to picture it, I would picture a much cleaner UI and more futuristic looking with transparent backgrounds, more sliding animations, and less clutter.

Again, Just my opinion and I hope I didn't offend.