Only got to level 5, IQ of 88. i was doing fine until it started asking for places in China and Russia and so on. I don't know where they are within the country at all. I was only a few thousand of level 6 so I shall try again. My 1440x900 screen may not help much either for precision.
Edit: Made my screen bigger and got an IQ of 101, level 8 which could be worse I suppose.
I got to level 6. The problem with the game is that the map is too small. For instance, I knew where Manchester England was, but the mouse pointer is so large compared to the actual map of England that I clicked on a spot that was just off of it.