Clean up some duplicate code.

src/Ball.hx

@@ -16,8 +16,10 @@ class Ball extends Entity {
 	public function new () {
 		super();
 
-		x = HXP.width / 2;
-		y = HXP.height / 2;
+		x = HXP.width / 2; // These are just in case G.paddle doesn't
+		y = HXP.height / 2; // exist, which shouldn't ever happen.
+		putOnPaddle();
+
 		width = 10;
 		height = 10;
 		centerOrigin();
@@ -30,8 +32,7 @@ class Ball extends Entity {
 
 	override public function update () : Void {
 		if (!launched) {
-			x = G.paddle.x;
-			y = G.paddle.y - G.paddle.halfHeight - halfHeight;
+			putOnPaddle();
 			return;
 		}
 
@@ -79,6 +80,14 @@ class Ball extends Entity {
 		launched = true;
 	}
 
+	public function putOnPaddle () : Void {
+		if (G.paddle == null)
+			return;
+
+		x = G.paddle.x;
+		y = G.paddle.y - G.paddle.halfHeight - halfHeight;
+	}
+
 	override public function moveCollideX (e) : Void {
 		if (Std.is(e, Brick))
 			hitBrick(e);

src/BreakoutWorld.hx

@@ -107,9 +107,7 @@ class BreakoutWorld extends World {
 		G.score = 0;
 		add(new ScoreDisplay());
 		paddle = G.paddle = new Paddle();
-		paddle.active = false;
 		add(paddle);
-		add(new Activator());
 		placeBall();
 
 		var seed:Int = 0;
@@ -125,8 +123,6 @@ class BreakoutWorld extends World {
 
 	public function placeBall () : Void {
 		ball = new Ball();
-		ball.x = paddle.x;
-		ball.y = paddle.y - paddle.halfHeight - ball.halfHeight;
 		add(ball);
 		paddle.recenter();
 	}