Start viewing the credits of the game. Click every line that has the letter 'o' in it. You will hear a chiming noise to confirm that you clicked it correctly. Click every line with a letter 'o' in it. Then when the list of names end, wait a while and more should come up. Click those with an 'o' in them as well and the words 'Secrets' should appear. Click it and you should be able to play the mini game. Make sure you click all of them with the 'o' or it will not work.