P4 hazards: food spoilage with rot speed setting, smoking rack and salt, food poisoning, harsher blizzards, hard winters with lake ice, lightning on trees, snow on roofs (protocol 11)

scripts/core/saves.gd

@@ -40,7 +40,9 @@ func list_worlds() -> Array:
 	out.sort_custom(func(a, b): return float(a.get("last_played", 0)) > float(b.get("last_played", 0)))
 	return out
 
-func create_world(world_name: String, seed: int) -> String:
+## `options` are the world's own settings, kept in meta.json (P4: "rot",
+## how fast food spoils: "normal", "slow" or "off").
+func create_world(world_name: String, seed: int, options: Dictionary = {}) -> String:
 	DirAccess.make_dir_recursive_absolute(root_dir)
 	var base := world_name.to_lower().replace(" ", "_").validate_filename()
 	if base.is_empty():
@@ -52,10 +54,13 @@ func create_world(world_name: String, seed: int) -> String:
 		n += 1
 	DirAccess.make_dir_recursive_absolute(_dir(id))
 	var now := Time.get_unix_time_from_system()
-	_write_json(_dir(id).path_join("meta.json"), {
+	var meta := {
 		"name": world_name, "seed": seed, "created": now, "last_played": now,
 		"play_time": 0.0, "version": VERSION,
-	})
+	}
+	for k in options:
+		meta[k] = options[k]
+	_write_json(_dir(id).path_join("meta.json"), meta)
 	return id
 
 ## The world slot called exactly `id` (a server's world), made with `seed` if