Perfectly on theme, really creative! There are only two issues I encountered:
1. The fill tool only works if you're actually filling something, so you cannot use it on the empty canvas. This lost me a lot of time for having to draw out an outline.
2. If you think about how the game would score you, you would think that it would just check each pixel to see if it matches. This makes drawing small details, unless you are really close to the original, almost worthless. You can get most of your points from drawing the background without the subject. This makes the game slightly less fun to play, but still very fun game.
Great job, this was the most creative entry I have seen yet.