6. The rooms are just objects that defines some commands like 'look',
   'east', 'north' and such things. When the user then types 'north',
   the room function will do something to the player.

7. An object may define a function "heart_beat". It will be called every
   third second. This can be used for automoving monsters, torches burning
   down and time delayed traps...

8. The most complex object is the player object. It defines commands like
   "get", "smile" and "kill".

9. When a player becomes wizard, he will get a small portable castle.
   He can drop this anywhere, and it will grow and become a full scale
   castle. He can then rename it and extend it. It is okey to rename it
   to "entrance to hell" or anything.

10. The language that defines objects are similar to C. It is interpreted.

11. There is a builtin ed-compatible editor for wizards creating objects.
    There is also 'ls' and 'cat'.