Use Left and Right arrow keys to dodge Nelson's snowballs. From time to time there will Snowman Homer appear. Hit him for more ammo!
In Springfield Snow Fight use your mouse to aim and throw snowballs.
There's a very good reason why Sid Meier is one of the most accomplished and respected game designers in the business. He pioneered the industry with a number of unprecedented instant classics, such as the very first combat flight simulator, F-15 Strike Eagle; then Pirates, Railroad Tycoon, and of course, a game often voted the number one game of all time, Civilization. Meier has contributed to a number of chapters in this book, but here he offers a few words on game inspiration.