I got stuck a few times when I left my city power too high and it ended up draining everything. Eventually I managed to get it to the point where I unlocked alternate power sources at which point I just abandoned the nonrenewable ones and let it sit until I had enough research and money to build the spaceship.
The main problem was that there's no good way to tell if you're power plants are working or not. You can't see how much power you are actually generating only direct it. And if you have more than one engineer buying resources it's hard to tell if one of them is not making a profit or not.
Plus the market seems to imply that the prices will go down with population, and that never seemed to happen. Prices only went down once I stopped buying them.
One actual bug I saw is that the geothermal plants get covered up by the credits.