Try -2,1 for lower left

assets/index.html

@@ -27,7 +27,7 @@
 
     var offX = 0, offY = 0;
     var speedX = 0, speedY = 0;
-    var targetSpeedX = 2, targetSpeedY = -1;
+    var targetSpeedX = -2, targetSpeedY = 1;
 
     var angle = Math.PI / 6;