The next time you fire up Peggle Nights a "Bonus Levels" icon shows up in the lower right on the main menu. Clicking on it will direct you to download and install the Bonus Levels. Restart Peggle Nights, click the "Bonus Levels" icon again and you get to pick from one of five Holiday Themed Levels. From a Christmas Tree to Frosty the Snowman. Depending on what characters you have unlocked, select one and enjoy! For Free!