Chipotle Mexican Grill is offering a buy-one-get-one-free entrée deal to customers who play an online memory game.

The game, which is based on the restaurant's animated short film 'A Love Story,' is available for free online. Players have to match ingredients cards and avoid additives, or "imposters." Anyone who completes the game will receive a mobile coupon for a buy-one-get-one-free entrée.

The short film that inspired the game "illustrates how competition among food businesses has caused food to become increasingly processed and filled with added colors and flavors. The film –- which has been viewed more than 61 million times -- follows the story of two young entrepreneurs, Ivan and Evie, and the escalating rivalry that leads them to build competing fast food empires with vast menus and heavily processed food," according to a press release.

To play the game, click here.