Thanks Vaclav, I'm trying to understand how I can use the watchdog timer. I have never created an h file in the Arduino IDE and realized it doesn't let you save as .h. Where can I find the h files you mentioned?
The timer interrupt is not for "end of game". I have two timer interrupts that each cause a different action to occur at a random time during the game and I want to restart after the second action. There is a lot of code so it would be messy to have a lot of timing checks throughout the code. I might just use the reset pin.