Building and Economy
The Mine supplies daily iron for sword and armor upgrades. The Forge, Armory, Hospital and Mine unlock Walls once all four are built. That gives progression a structure while leaving players room to choose their early priorities.
Hospital healing costs gathering and building time, so damage matters beyond lost HP. Shops pause the clock so newcomers can read and decide without menu familiarity becoming the main difficulty. A harder mode could reduce that pause. This is a reflection, not an implemented option.
What I would change
Each completed night adds one enemy without changing the composition. It was a simple solution for my experience at the time. Today I would try different enemy behaviours, positions and groups before relying mainly on quantity.

