Graphical Window Sprites
version 1 by Erik Temple
Part 11 - Control over quitting the game
[This rule is provided to allow the author to include a "when play begins" rule that stops the game if the interpreter does not support graphics. Borrowed from Michael Bacon's Interactive Poetry extension.]
The immediately quit the game rule translates into I6 as "IMMEDIATELY_QUIT_R".
Graphical Window Sprites ends here.