As people sending me their photos I got a feeling that people didn't understand the concept. Seems like a piece of cake, but
— Horizon should be even, not going up and to the left or up and to the right
— Perspective should also be even, without awkward viewing angles
— You should stand with your back to the camera, not facing it
— You should be small on a photo, this is not a portrait
— Phone camera will do the job perfectly
You can say I take it too serious, but you got it right, I take seriously everything. At least effort-wise.