scenta: This is so much harder than it looks. You’re presented with a little Flash maze, and you have have to maneuver a block through it — but the movement of your mouse has been reversed. Now you move it up to go down, right to go left, etc.
What it proves, I think, is how proficient we’ve become with the mouse. It’s just like an extension of our hand that we don’t even think about, and when someone plays with the rules, we don’t do so well.