The two windows on the left are leaning, while the one on the right is correctly perpendicular...
Also, if he is looking down on the children, the reflections in the windows would not show the faces from a "straight on" view, they would be angled down, showing more of the tops of their heads due to perspective. For them to "reflect as they are, you would have to see the children in front of the windows.

Interesting idea, but the execution needs more work.

unfortunatly IM too late to get the rest of this sbs up online but if you go to .my albums there is one created specially for this competition . When you look at something the nearest part appears bigger than the bit further away. I in looking down at the figures was
1- higher and thee fore closer to the top of the window and
2- because its a reflection I was also looking down on the parade correct.
However the childrens heads would not have been much lower than the windowledge and therefore the angle would not have been very perceptible especialy as some of the heads are tilted anyway. Note the angle of the mans head in the original picture by CorneliaMladenova. That head was only flipped sideways no other angle was changed..
Maybe I should have called it BIRDS EYE VIEW

very neat work...best of luck author

you do get the urge to see the parade (PAN DOWN.. PAN DOWN) hehehe.. good luck author

Ugh... I hate agreeing with Mossy....