The wait is over! The answer is (b); the magnet will not rotate along the other axis of rotation. The magnet will instead translate side to side, and any component slightly perpendicular to this translation will cause a rotation along the same direction as before.
Under the hands of the overzealous operator, the magnet can be shoved so strongly that it flies completely over the edge of the superconductor and into the bubbling sea of nitrogen.
In the original situation, the axis of rotation was around the North-South pole of the magnet; since both the cube and the magnetic field lines have symmetry in all directions, the magnetic flux through the superconductor is unchanged as it spins merrily about, until damped by air resistance.
However in the case shown above, we are attempting to rotate the poles themselves! Doing so will certainly change the flux through the superconductor and would imply that the eddy currents -- already setup to oppose the magnet as it levitates at rest -- would have to continuously change as well! Said another way, ourpersistent currents are persistent not only in their magnitude (amperage) but in their direction as well. Thus the eddy currents resist the rotation of the magnet's poles and does not allow the cube to rotate freely along the other axis.
Your final question for this demonstration is to explain what determines the path of the magnet as it moves over the edge of the superconductor into the LN bath.
