Ah, so I managed to continue the game before the disaster, and it looks like there was a single pixel of ungreened energy in one of the circles. It was extremely difficult to tell that it was even there, or what color it was supposed to be.
My suggestion would be to add some kind of display on hover (maybe at the bottom?) showing the actual percentages of each type of energy in a region. Alternatively, some kind of marker (a star?) when a region has actually achieved 100% green energy.
I really enjoyed this game! Great work!