oh, come on... rpg elements are in everything these days.
you could have little villager npcs wandering about doing random things... eg: once you build the bar, and there are enough npcs in it, shouting comes from inside... if you build a garden a couple o npcs come up and start arguing about what to grow - tea, coffee, tangerines, horrible turjanish experiments... when you build the church, and the bc npc and a female npc get into proximity of it, bc drools and the girl pokes him with a pointy stick.
see? humour opps a plenty.