The modelled sensitivity to movement seems about right, with the rubber and ping-pong ball options adding extra layers of difficulty with their bouncy nature making it even harder to keep control - in the ping-pong ball's case, with seemingly random gusts of wind, to boot! And, as my father (who played the wooden originals back in his childhood 60 years ago) remarked, some of the hole placements are downright evil, especially as you progress from level to level.
Read the full review of Marble Maze here.