Add a run_game.py script.

diff --git a/run_game.py b/run_game.py
new file mode 100755 (executable)
index 0000000..f48806a
--- /dev/null
+++ b/run_game.py
@@ -0,0 +1,5 @@
+#!/usr/bin/env python
+
+""" Run Portentosa. """
+
+import koperkapel.__main__