Add 'small' to the vocabWords of brassKey (see KeyedContainer).
Add a line of code to prevent the game becoming unwinnable if the Tardis is parked outside the caves before the rockfall has been triggered by climbing the ladder (see the definition of tardisButton in DynamicLocations).
Add an example of an AskTellShowTopic.
Add an example of an AskTellGiveShowTopic.