Rovio has a lot riding on its new animated movie. Earlier this month, the Finnish company reported a €13 million ($14.8 million) operating loss for 2015, blaming "heavy investments" in future projects. The popularity of Angry Birds is waning, but a commercially succesful film could be its salvation. As such, it's developed a new app called Angry Birds Action!, which rewards players for seeing the movie on opening weekend. Players that open the app during the end credits will be treated to an "exclusive movie clip" and a new area of the game to explore. The feature is triggered by an "inaudible digital watermark" that plays in the background.