I am designing an app for an online taxi booking portal. The workflow is designed in a way in which the users must wait for 120 secs for booking to get confirmed. While the customer is waiting for the booking to be confirmed as an experience designer I suggested that we display a timer in secs or minutes but my senior wants to display something like this http://astretchyhand.com/ or any other flash game with the countdown timer.
I feel as an app that provides service to the customer it is deflecting from its purpose and does not have a polished professional outlook. Senior feels that it is necessary as the customer has to wait for 120 secs let him be engaged in this game, which according to me isn't necessary because if we have displayed a countdown timer (like we do at traffic signals) customer would understand that the service he has requested is working at the 120 sec countdown timer and if he has anything else to do let him engage because he will come back to check the app after the timer has expired.
What would be the right call to action over here?
Should I just provide a timer or should I provide a flash game and a timer?