Great but needs work
first of al, ged rid of the power bug
second: stop letting your city evolve on its own
(most of the time I had a city for 12000people but only 1500inhabitans and thats realy irritating becouse those 1500 are eating for 12000 and I have to spend most of my money to farms)
So just set the automatic upgrading off,
there is alredy a mode you added with building to upgrade your city keep it with that.
Besides that, I like a chalange so without these bugs it looks like a great game
(never survived it to the research part so I can't tell about that, maby make that a bit cheaper I don't know)