Tank Game	Written By: Andrew Mentges E-mail: wrathnut@hotmail.com
	Instructions: Click inside the applet to activate it. Left and Right arrows: Move tank left or right. Up and Down arrows: Rotate barrel counter-clockwise and clock-wise. Enter Key: Fires cannon balls. You can only fire four cannon balls at any one time. Tab Key: Start a new game, when the game is over.
Purpose: To help visualize different types of simple projectile motion, and incorporate them into a game. 1.) Bombs dropped from the planes. 2.) Cannon balls being fired from the tank. 3.) Explosion particles.