Popeye Progress

Having a little time to practice Popeye I learned something new. The counter that represents the rounds changes to letters on the tenth round. This brings up a curious possibility: what happens after round Z? Does it wrap around to 0? Will it start displaying funky symbols? Will the game crash?

I also learned that the sea hag will only throw one skull when the barrel is still hanging. Drop it and she starts throwing three at a time.