Everything fine here. Nice work!
Oh, by the way, you compose also?
EDIT: I didn't notice it before, but I'm getting the jumpy pixels also (when scrolling)!
EDIT2: Having a further look, I think I can explain the issue. The tiled background, the one that is going 'outside' the frame shakes, and any sprite it overlaps will 'shake' also. It is quite hard to explain the phenomen, but that is how I see the bug.