Thanks for trying it out.

I tried to explain it the description but I guess it wasn't eoungh :(

The base idea is that you use carrages and ships to distribute resources in cities. At the start of each day city inhabitants will consume resources to stay happy and or use then in production of other resources. If you had any demanded resource stored in that city at that time, they will buy it from you and you get the gold. 
In other word, you are selling to the citizens based on demand instead of to the city.

You start off with 1 carrage full of stuff and a ship, both marked green. ckicking on them should open a menu from which you can make them move to any city. From there you should be able to store all or some of the resources in visiting city and earn gold at the start of each day. And inside city menu there is a button to select visitig carrage again and sent it to otherlocation.

The idea was that you end up with a fleet of carrages and ships going from city to city and while you can buy new carrages from city and they can be automated via trade routes all this still needs more work to look nice.

I think I should also work on a smaller mat that could work as a tutorial.