when you place fireplace at most right and click on upgrade the grass field will also be selected.
it would be good to see how many units are going to be produced and how many resources are going to be consumed. like in a saw mill or mine.
Give option to upgrade Field to Mill instead of having to delete old building. Ideally keep old production cycle when upgrading.
Make pausing a unit not stop right away during production as this doesn't really make any sense but have production stop after the current cycle instead.
Resource usage of the mine appears to be broken. It consumes way too much wood. I tested it and it took 50+ wood in one go.
With upgrades show which resources are still missing and which are already available.
show info of unit health otherwise it is wild guessing if the unit will survive another attack. give info as to range of unit.
5 wood -> 1 paper