Potential for a sequel?
It occurred to me that there are in fact enough birds from the regular "flinging" game to fill out a new band of five in a theoretical Angry Birds Epic 2, if Red is kept as the protagonist:
Stella (pink)
Bubbles (orange)
Hal (green)
Terrence (large red).
And then I got thinking of party roles and differences in game balance - if it was the same game, only reskinned, that would be boring; if anyone around here played City of Heroes while it was running, think of the Villain archetypes as an analogy. In the original game, birds' roles could be thought of as relating to Single Damage, Multiple Damage, Healing, Damage Reduction, Effects (that is, dealing with them by cleansing and dispelling), and Control (stunning or redirection of attacks).
So based on what the other four birds do when flung, I can see boomerang Hal as some kind of martial-arts mystic, a plausible basis for Healing/Control oriented classes with decent single target damage. Stella is an obvious shield mage with her rainbow bubbles, making her a clear choice for party defense with a side of Effects (breaking shields to go along with making them). Terrence makes a fine stand-in for Bomb, but perhaps with more focus on being a tank than on throwing out tons and tons of damage, though naturally he should be able to hit reasonably hard as well, and I can see Bubbles taking a similar role as Blues. With a lineup like this it would make sense for Red to increase focus on dealing damage rather than shielding, but his classes could probably remain pretty similar.
I'd play it.