Creating a Viral Game: Tunnel Panic - The Essential Guide to Flash Games - page 615

case STATE_SYSTEM_PLAYER_EXPLODE :
systemFunction = systemPlayerExplode;
break;

}
}

private function systemGamePlay(timeDifference:Number=0):void {
if (playerStarted) {
checkInput();
}
update(timeDifference);
checkCollisions();
render();
updateScoreBoard();
checkforEndGame();
}
private function systemPlayerExplode(timeDifference:Number=0):void {
playerSprite.alpha -=.005;
if (playerSprite.alpha <= 0) {
playerExplodeComplete();
}
}

public function checkforEndGame():void {
if (gameOver ) {
playerStarted = false;
switchSystemState(STATE_SYSTEM_PLAYER_EXPLODE);

dispatchEvent(new CustomEventSound(CustomEventSound.PLAY_SOUND,

Main.SOUND_EXPLODE, false, 1, 8, 1));
}
}

private function playerExplodeComplete():void {
dispatchEvent(new Event(GAME_OVER) );
lastScore = score;
trace("lastScore=" + lastScore);
disposeAll();
}

This code allows user input. The only user input we need in Tunnel Panic is the space bar. When
it is pressed, we decrease the y value of the playerSprite (moving it up the screen).
private function checkInput():void {
if (keyPressList[32]) {
playerSprite.y -= playerSpeed;
}
}

private function keyDownListener(e:KeyboardEvent):void {
keyPressList[e.keyCode] = true;
}

private function keyUpListener(e:KeyboardEvent):void {
keyPressList[e.keyCode] = false;
}