This is a useful little egg hidden in the game. It was found purely by accident.

Ever notice that the chuzzles roll their eyes and watch the mouse? Well apparently that's not just for looks. If you ever find yourself stuck on a casual classic game (not sure if it does it in expert) just sit and watch for about a minute. After a few seconds to a minute, the hint star will flash. Wait a bit longer and watch the chuzzles. One of them will roll its eyes to the right. That's the chuzzle you need to move to make a match.