I enjoyed the free ‘sample’ set so I purchased the game. However, my enjoyment is now zero as I cannot complete level 11 as the ‘ball’ that has to be moved thru the maze will not move. (Yes, I followed the directions on how to move the ‘ball,’ and did not have a problem with an earlier level.) Unless, I finish that level, I cannot continue. Either fix or refund the money I paid for this game.