A different labyrinth of rooms at each of the 18 levels of Grail Castle requires a high degree of sustained concentration for Parsifal the bewitched mushroom, whose quest is to seek the Holy Grail and thereby transform back to human shape.

If in your fungoid role you can outrun or kill the various monsters, the next step is to find and carry three coloured keys to their correspondingly coloured rooms before moving to the next level.

At each level you are given less time to achieve your task.

But if you fail, you are cast back down to level one (unless you know the password) - a frustration heightened by the slow response of the keyboard/joystick.

J.W.