Pretty cool :)
I like the idea you had here of telling a story through images, and the incorporation of a spot-the-differences puzzle into that concept was pretty neat :) The level of the puzzles was about right, but I found that the hints feature made it too easy in that you could just wait and be told the answers whilst only sacrificing a couple of points. Plus, even though I'm slow, I still like to find the answers on my own. The story itself could have done with more of an ending - I expected it to end with a confrontation with the bullies but that plot element was bypassed and then the competition was introduced - but the game just cut off before that went anywhere.
I also meant to make this suggestion in my 'Stolen Art' review but it slipped my mind: you might want to include a brief 'how-to' on the controls because they confused me a bit at the beginning.