Create a Countdown Timer in Python that takes a list of seconds to process automated countdown simulations.
Requirements
1. Inside the game, use the time module to handle time delays during the countdown loop.
2. The game will accept a list (timer_inputs) containing different duration values in seconds.
3. Run a for loop to process each duration and track the remaining seconds dynamically.
4. Validation Logic :

1. Format the remaining time into a clear Minutes:Seconds (MM:SS) display layout.
2. Use time.sleep(1) inside an inner loop to decrement the counter second by second.
3. Print the live ticking text updates directly on the screen for each second.

5. Print a final completion message once the timer reaches zero and successfully finishes.