*** Gamepad simulates an analog joystick input using the keyboard. Many times when we access key presses, what we are really doing is pretending that WASD, the arrow keys or some other combination are actually a D-pad or joystick with an X and Y axis, and 1 or 2 fire buttons. ...
} You will no longer see a trace statement when you press the arrow keys, nor will you see any other visual indication that your game is working. But behind the scenes, your program now knows which keys are being pressed, which is essential to making our game. Scrolling the Background B...