Really fun concept!
As others mentioned, it felt choosing blue and building early industries solved the problem of scarce resources, but that's more on the balance than a real problem.
The only thing that was not too clear to me was how the two territories interact with each other during the fight. Sometimes I'd see enemies aiming at the other screen and bullets flying from one to the other, but I could not really use that mechanic. Other than that, I noticed there was a hidden button behind the middle gem that I'm not really sure what it was for 🤔
Presentation was also stellar! Well done!