There’s fun afoot, but at nearly two hours, this one just wanders, taking forever to capitalize on that portable door.

There’s ramshackle funhouse charm to spare here, and while the plot occasionally trips over the odd loose floorboard, the fun ideas and game performances soon pick it back up.

If the tension flickers on and off... The Portable Door never entirely loses its edge, thanks largely to an irascible Neill as Wells’s right-hand man, and a sharp-tongued sensibility reminiscent of Roald Dahl.

Fine fantasy fare.