diff --git a/index.html b/index.html
index 989f834..5585c19 100644
--- a/index.html
+++ b/index.html
@@ -33,7 +33,8 @@ var _COLOR_GRASS = '#388E3C',
 
   var _MAX_BRACKET = 100,
       _BALL_SPEED = 100,
-      _BALL_SPEED_THRESHOLD = 10,
+      // _BALL_SPEED_THRESHOLD = 10,
+      _BALL_SPEED_THRESHOLD = 0,
       _HOLE_WIDTH = 15
 
   $(function(){