Problems with Concentration Game \ Flaschards \ Listening Test

Is anyone else having a problem clicking the buttons for these 3 sections of the website? 

 I'm having the problem on different computers, all of which have the latest version of macromedia installed.

The problem:  my mouse cursor cannot click the buttons.  It flickers back and forth between the arrow and the pointer that recognizes that something is clickable.  

Strange...