On the main menu press play then go to the third page, then select the first map "CANDY FALLS". Once in the map click the 8 hidden monkeys of the map in the order shown on the image bellow make sure you click them fast or else it might reset.


After you finish exit to home, open achievements then claim the "GOLDEN TICKET" achievement. Now you can go to settings then extras and enable the "SMALL MONKEY TOWERS" mode now next time you play the monkeys should be small. :3