I have angry birds from this company, and it works nicely on a core2duo 1,66Ghz laptop with intel gma950 graphics.
But the one I downloaded for free from this intel app store works like crap!
I get 1fps out of that one, especially when the bird hits some objects and the objects are tumbling, 20fps when it's doing nothing.
That's pretty lame, and not optimized for atom, otherwise my core2duo should be able to do this game quite easily!