Level traversal works, but it's very immediate. Next is a little 'confirm level' modal and a transition screen.

inventory.cpp

@@ -15,6 +15,7 @@ namespace components {
   }
 
   bool Inventory::has_item(size_t at) {
+    fmt::println(">>> INVENTORY: requesting item at {}, have {} items in stock", at, items.size());
     return at < items.size();
   }