Those birds in the third screenshot look pretty much the same as the Angry Birds to me (I didn't compare them directly, but I don't think that's necessary anyway). You're also directly advertising this with reference to Angry Birds (see title of this post).

I'd say you're pretty much flouting basic trademark law here, and the only way for Rovio to react is to protect their trademark, or lose it. It's all the more likely if they are working on their own title from the viewpoint of the pigs - and I'd say the odds are pretty high that they are.

In addition, the idea of this being parody is not something I'd want to defend in front of a judge...