Nice to see some space strategy, you almost done basic of your game to be playable. But i would redesign UI, now it's looking like 1990 game, i would simplify icons and gave them uniform look, also screens like research have really anoying background so you focus more on background than on information displayed. In planet overview you should add hints about how resources are produced, like +1 100 credits (+800 mines, + 400 taxes, -100 fleet maintence) and same for those % stats. Also ship building should be improved, listing through list of weapons isn't fun, i love how they done it in Stardrive 2, but that would take some serious time to implement.
Anyway, i will folow you for your future improvment, keep working you are on good way ! :)