Happy Aquarium: Play Werther's 'Caramelfest' for a free Crowdstar Golden Shark
"Caramelfest" presents players with a caramel apple recipe, and players must visually choose ingredients from the left that match what they see on the right. There's six recipes available: Caramel Apple, Funny Face Apple, Almond Drizzle Apple, Cookie Caramel Apple, Coconut Caramel Apple, and Cinnamon Spice Caramel Apple. Moreover, each of these recipes can also be printed directly from the game. (Note: Just be sure you've a PDF reader, cause the recipes are formatted as PDFs.)
When you're done playing Caramelfest, the offer will disappear from Happy Aquarium. But the game can still be found on Werther's official website here. It also has its own Facebook page, but it's definitely not a social game, nor does it aspire to be.