Expand unit tests with comprehensive coverage of survival mechanism

Co-authored-by: dmccoystephenson <[email protected]>

Author: Copilot

.coverage

@@ -268,5 +268,6 @@ def run(self):
         self.printStats()
 
 
-kreatures = Kreatures()
-kreatures.run()
+if __name__ == "__main__":
+    kreatures = Kreatures()
+    kreatures.run()