This game did not entirely make the full concept, but you can read about that over here: http://www.ludumdare.com/compo/2014/08/23/ludum-dare-2-0/

Camera:
Use right/middle mouse or arrow keys to move camera
Press '0' to reset the camera

How to play:
It is your goal to set up trade routes and become rich. Certain cities provide a certain commodity (recognised by their icon). To start a trade route from that city, you will have to build a trade hub there. You can then add up to five trade routes that start from that hub to other villages.
Trade routes are useless without adding vehicles to them. You can buy carts in the top left corner and apply them to trade routes using the +/- buttons in the trade hub display.
Once you start earning some money, you can also build roads to speed up your carts and deliver even more resources. Building roads can be done from the road interface, accessed by the button in the top left. Click on existing roads to upgrade them to better variants.

Tools used:
- Unity3D
- Photoshop
- Sublime Text