diff --git a/ff0fsum4zx.js b/ff0fsum4zx.js
index 5dd7cfd..febbc3d 100644
--- a/ff0fsum4zx.js
+++ b/ff0fsum4zx.js
@@ -79,6 +79,8 @@ this.ballY = this.football.instance.geometry.boundingSphere.radius / 2;
 
 this.activeBall = null;
 
+this.invertMouse = true;
+
 if (this.debug) {
     this.arrowHelper = new THREE.ArrowHelper(
         new THREE.Vector3(0,0,-1),
@@ -305,9 +307,22 @@ R3.CustomCode.prototype.render = function(delta) {
 R3.CustomCode.prototype.move = function(data) {
 
     var x = data.x || 0;
-    var y = data.y || 0;
-    x *= 0.0025;
+    
+	var y = 0;
+	
+	if (data && data.y) {
+		
+		if (this.invertMouse) {
+			y = data.y;
+		} else {
+			y = -data.y;
+		}
+	
+	}    
+	
+	x *= 0.0025;
     y *= 0.0075;
+	
 
 	this.playerRotation.x += x;
 	this.playerRotation.y += y;