Why bother? Well, if you don't, you won't find this funny, and it's really funny. Someone mentioned it on Twitter. Can't remember who. The first of the letters from the front lines reads:
Dearest Martha,I love 'perhaps seven or eight levels'.
It has been some time since I've had the opportunity to write you, perhaps seven or eight levels. The green pigs have fortified their defenses and there seems to be no end to this madness. They are an industrious lot who have remarkable construction skills in spite of their lack of arms or legs. They're a formidable enemy but I still envision the day we can bring our eggs home safely.
Keep the nest warm for me,