The biggest gripe I have with the controls is that the camera automatically pulls in too close on the left, so you think you can start playing, but the second you pull back, you hit the edge of the screen and lose a bird. Really frustrating.
To Rovio's credit, the Chrome browser remake as well as the Space-themed new installment have righted this and the camera will happily zoom out a touch more, or scroll further left for your convenience.
I'm not sure where they'll go from here though. With gravity wells now introduced, they've utilised the full two dimensions of a flat screen.
Nice to see Miyamoto praising the gameplay. Game complexity should be simple on the surface and deep underneath, something this game excels at.