diff --git a/public/main.js b/public/main.js
index 7a6e206..6868a45 100644
--- a/public/main.js
+++ b/public/main.js
@@ -397,15 +397,18 @@
 		return Math.max(min, Math.min(max, value));
 	}
 
+	function ballPositionFromEvent(event) {
+		return new Vector(
+			clamp(event.clientX - document.getElementById("gamecontainer").offsetLeft, BALL_RADIUS, playfieldWidth - BALL_RADIUS),
+			clamp(event.clientY - document.getElementById("gamecontainer").offsetTop, BALL_RADIUS, playfieldHeight - BALL_RADIUS)
+		);
+	}
 	function moveMouseCallback(event) {
 		if (isGameOver) return;
 		// move player
 		var previousPosition = playerBall.outline.centre;
 
-		var newPosition = new Vector(
-			clamp(event.clientX - document.getElementById("gamecontainer").offsetLeft, BALL_RADIUS, playfieldWidth - BALL_RADIUS),
-			clamp(event.clientY - document.getElementById("gamecontainer").offsetTop, BALL_RADIUS, playfieldHeight - BALL_RADIUS)
-		);
+		var newPosition = ballPositionFromEvent(event);
 		playerBall.outline.centre = newPosition;
 		playerBall.velocity = newPosition.sub(previousPosition).mul(0.1);
 	}
@@ -438,20 +441,14 @@
 		ballAddTimeout = window.setTimeout(ballAddTimeoutFunction, addMessage[1] * 1000);
 	}
 
-	function startGame() {
+	function startGame(mouseEvent) {
 		document.getElementById("music").currentTime = 0;
 		document.getElementById("music").volume = 0.5;
 		document.getElementById("music").play();
 		document.getElementById("playbutton").style.display = "none";
 
 		playerBall = new Ball(
-			new Circle(
-				new Vector(
-					canvas.width / 2 - BALL_RADIUS,
-					canvas.height / 2 - BALL_RADIUS
-				),
-				BALL_RADIUS
-			),
+			new Circle(ballPositionFromEvent(mouseEvent), BALL_RADIUS),
 			new Vector(0, 0),
 			"blue",
 			0