Thistle Walls

Save the helpless ball head trapped between four deadly walls of thistles.  As it bounces from wall to wall, you must keep it alive by covering the pikes on each wall just before it makes contact.Your fingertips are its only defense against a painful end. With every bounce, the ball head veers closer to its doom. The only question is, how long can you keep this gravity-defying ball head alive? G…