Some actual coding today. And, it really makes a noticeable difference. Now, while you are playing the game, a score is displayed on the screen, incrementing by one each time you shoot a growth. When you bump into one of the growths, the game is over and you are taken to the "Game Over" screen. It displays your score and allows you to quit or start a new game.
Tomorrow, I think I am going to mess with a number of different options.xml files to experiment with finding a setting that is fun.
I also might need to think about "levels." Starting the game at a slower spawning and expansion rate and then increasing it as you achieve certain point values.
Also need to tinker with allowing the health of the growths to be adjusted via options.