Fix the bug
I will fix the score
^^

In Power Puff Girls click in the left bottle not the right Thanks! ^~

Completed seven out of 17. Think I did badly. :/

WARNING: SPOILER

Two differences in (bottom left) in the Power Puff Girls picture is not working if you try to click in the right window. I.e. the bottle and the button of the major.
For a spot the difference game, this is kind of a major bug I think (running Opera 34.0 under Windows 7)

This and the lagging cursor has already been pointed out I think.

The critique HerbieG pointed out is not really valid: If you pay attention to the picture you notice the whole plant is mirrored and can be counted as a single difference.

Nonetheless, nice artwork!

I'm not sure I favour how the mirrored cursor moves way slower then my real cursor.

Is there any way you can adjust it to move at the exact same speed?