Update design_prototype_decent.py

Test // | Game | Help | Quit
Welcome to the application
>>> game
Test // | Main | Help
Let us play this game
>>>
Test // | Main | Help
Your score is 1
>>>
Test // | Main | Help
Your score is 2
>>>
>>>
Test // | Main | Help
Let us play this game
>>>
Test // | Main | Help
Your score is 1
>>>
Test // | Main | Help
Your score is 2
>>>
>>> main
Test // | Game | Help | Quit
Welcome to the application
>>> ^CBye bye