According to The Disney Blog:
Add the magic of Disney & Pixar characters to your mobile communications with the more than 400 emojis that appear in Disney Emoji Blitz, a new mobile game and custom keyboard available now on iPhones and Android devices. You’ll find emojis representing characters from favorites like “The Little Mermaid,” “The Lion King,” “Cinderella,” “Frozen,” “Finding Dory,” “The Muppets,” “Toy Story,” and more!
The game is a fast-paced match-3 game where you score points and unlock new emoji. Each emoji has its own power and you can power-up and blast the board with combos. Complete missions to boost your score and earn digital prices like Rare Disney parks themed emoji, such as Mickey Ice Cream Bar, the Matterhorn, and Mickey Mouse Ear Hats.So far the only two Muppets featured are Kermit and Fozzie:
Each emojis has special abilities. Kermit uses musical notes to clear other emojis on the game board, and Fozzie uses flying tomatoes.
If your over 30, don't play video games, and have no idea what any of these is check out this video of the game:
I still don't get it, but it seems like you play the game and get to keep certain Disney Emoji's when you win certain stages. Then you can use the emoji's in text messages by using the Disney Emoji Blitz keyboard.