Too neat! The textures and the square patches of colors on the building are great... and something about the posture of the waldo on the roof is somehow comical and pathetic looking. Cool image!
Looks like two Waldos at first but I'm thinking the one on top of the building is actually a vent or something that you are hoping people see first and guess that its Waldo when Waldo is actually on the lower side of the shot right between the color change in the wall. Your choice of exposure is quite good getting the right amount of light in the right areas. The sky colors are very good as well.
At first I thought - 'Hmmm? Looks like a 7-ish photo to me. I didn't know what a 'doppelganger' was - so, I Googled it. Now your photo make perfect sense. Great job! 10
I was hoping for one of these; I tried to talk a friend into climbing on top of a building, but he wasn't going for it. Here, the choices are great. Two people, the lines from the block of the buildings, and nice earth tones against the sky. I wonder how this would look in B&W? I might have tried some different crops, as well (maybe moving the block lower and to the left; maybe), but for me it's strong as is, too. 8.