Fixed occasional issue with startup. See pyglet/pyglet#1019

pacman.py

@@ -8,8 +8,15 @@
     os.chdir(sys._MEIPASS)
 
 
+import pyglet
+
+# This improves stability by preventing strange occasional crashes when creating main window.
+# It also appears to avoid other occasional issue where process takes long time to end after window closed.
+# See GitHub issue pyglet/pyglet#1019
+pyglet.options['shadow_window'] = False
+
+
 
-import pyglet.app
 from src.window import Window
 
 window = Window()

references/Additional references.txt

@@ -1,2 +1,8 @@
 On the Pseudo-Random number generator for Frightened ghosts:
-https://youtu.be/eFP0_rkjwlY?feature=shared
+https://youtu.be/eFP0_rkjwlY?feature=shared
+
+On the number of lives in Pac-Man:
+https://www.reddit.com/r/Pacman/comments/gvwj5k/questions_about_lives_in_the_original_pacman_from/
+
+Example of a perfect game:
+https://youtu.be/AuoH0vz3Mqk?feature=shared