there is more to it than that. i was able to defeat this the first time i tried it.
there are many tests which indicate right brain or left brain thinking or can show integrated thinking which they assume is caused by damage to the frontal lobes of the brain. i think it is an indication of the amount of neural connections in the brain and that effects how integrated the two halves are when they work. musicians show more of these tendencies due to the fine coordination of the right and left hand or other body parts.
i think this is a way for the "experts" to condemn out-of-the-box thinking. the web is full of these tests if one looks. their meanings are not as certain as some would lead you to believe and the interpretations of the tests are always suspect.