Hey KayZ! I see your game could greatly benefit from a better "Onboarding" process, which is quite necessary for strategy games. You see, when you begin games like Civilization and Age of Empires, they go to great lenghts to slowly unfold through play the mechanics, dangers and supports of the game. That's why it's kind of risky to make a strategy game in a game jam.
That's why I became very confused at the beginning, with no real understanding of what I could and why exactly, even reading your description. Still, the whole puzzle-like quality of reaching a balance between road placing and building could lead to very interesting situations. By your description of missing features I believe it would be explored in a really cool way.
As @nomaki said, it is an excellent base to work indeed, but very overscoped for compo. I hope you learned a great deal, and don't give up on this project! Follow through and see where it will lead you!