When I saw this, I was just laughing my head off. the background and the sky are VERY well done! The green land could be needing some slight extra stuff but the sky is good nether less. Sonic looks so hilarious, like he's screaming "AAAAAAUGH!!!" LOL.
I heard a lot about Angry Birds, but I NEVER tried it out. Someday, I might someday. My only request is that you do this to other Sega characters! Maybe Shadow, who doesn't like being flung! This is well done, and an awesome heck of a parody for both AB fans and Sonic fans.