I really love the game, good work! Played level 2 twice last night. I have two suggestions though: It would be nice to know how long it takes until the temperature is high enough to produce power. But maybe that was intentional, so it is more dynamic. Also times on the wind and solar energy diagram would be nice for better planning. Also it would be great to have the option to keep playing after progress is full. I was eager to see the whole thing working without coal.