Great game. I lost track of time for a but while playing it. Very engaging and easy to understand for beginners.
I would just like to point out, regarding 'what is left for v1.0 is balance improvements and tweak gameplay', that upgrades to amount to energy sold vs amount of heat converted to energy seem - to me - somewhat unbalanced as the energy sold was faster to upgrade than heat conversion could be made [my entire map was pretty much all small generators and solar panel sinks] - which only changed when I finally unlocked the medium generators. My direct suggestion to this is either make the office upgrades more expensive or expedite the time to obtain the medium generators.
Additionally, it would be good if we could delete buildings with right click, especially while already in build mode.
Hope this is understandable - I suck at writing things in an understandable way - and that it's appropriate. Keep up the great game.