It was difficult to determine the terminating condition for this game as we decided to make it time-bounded.
Then we made use of the 'sys' module of python.

We started the clock just before the main function and in the main function checked for the duration elapsed. When the required duration was over, we wanted to display the message Times up. But it appeared for a fraction of seconds only. To make it appear for a while on the screen so that the user is able to notice, we made use of while loop as all other methods were failing.