The Valentine-themed levels are part of Angry Birds Seasons, the spin-off version of Angry Birds that first made its debut last fall.
In addition to 15 standard levels of pig-busting fun, Angry Birds Valentine's Day features some interesting new tie-ins with Facebook and Bing.
On the main app screen, users are invited to go to Facebook to send Angry Birds-themed Valentine's Day cards. We were able to connect to our Facebook accounts on the iPhone and iPad versions of the game, but weren't able to actually send the bird-themed greeting.
Fortunately, the page can be accessed from a regular web browser too.
Moving on, by clicking on a link on the second page in the app and clicking the Facebook "Like" button, three more levels are opened.
And of course, it wouldn't be Angry Birds without hidden surprises. It looks like there are three different golden eggs in this latest Angry Birds update, and Rovio has partnered with Bing to offer an instant link to a pre-filled Bing web search.
In past Angry Birds updates, we've seen Rovio push more of its other content, including Angry Birds plush toys and other merchandise, but this is the first time extra content has been linked to fan pages or other partnerships.
During Sunday's Super Bowl, the birds received a cameo in a spot for the upcoming film Rio (which will be getting its own edition of Angry Birds this March) that gave fans a clue to a hidden level.