Updated "Development status" in the README.

Author: Kodiologist

README.rst

@@ -51,7 +51,7 @@ While Yves kindly provided me with IQ's source code for reference, SQ is an orig
 Development status
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-SQ is reasonably polished and allows playing through several complete quests. The primary thing that's missing is the implementation of more tile types, to support more of IQ's original quests. I also plan to do some larger-scale code cleanup and document some of the interesting parts of the implementation, so that SQ better serves its purpose as an instructive example Hy program.
+SQ is reasonably polished and allows playing through several complete quests. Not quite all of IQ's tile types are implemented, and so a few of its original quests (Nightmare 2, Delirium, and the original tutorial Boot Camp 2) aren't completely playable. You can try them if you want, but they aren't listed by ``--quests``.
 
 Version history
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