Alright. Most of today was spent refactoring (and occasionally ranting), after a protip by @queenofsquiggles sent me down the path of converting a load of stuff to #GodotEngine custom resources.
Eventually after much drama, I managed to get back to where I'd started, functionality-wise! Ah the joys of refactoring.
Still, in the last ten minutes I did get to add a new thing, we now have a(n ugly but working) population counter for the lil hex town! Woohoo!
