game logic overhaul

        + quit.addListener(new InputListener() {
	+ public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
	+ AudioPlayer.playSound(Assets.buttonSound);
	+ return true;
	+ }
	+
	+ public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
	+ screen.setState(new GameOver(screen));
	+ }
	+ });
	+
	+ playMusic = new TextButton("", Assets.skin, "play");
	+ playMusic.addListener(new InputListener() {
	+ public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
	+ AudioPlayer.playSound(Assets.buttonSound);
	+ return true;
	+ }
	+
	+ public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
	+ screen.getMusic().play();
	+ Settings.musicEnabled = true;
	+ }
	+ });