Possible Clues:

• Young man with the German painter's aid
• Row of unravelled stitches
• Start to land on snake here? No
• House-painter's need
• Set of steps for avoiding the snake
• Large snake -- it goes the other way on board
• If one is using this, one must follow a few simple steps for getting to the top
• Snake at No. 50 -- or might it be this?
• Set of steps for getting one over on the snaky figure
• One designed to climb — or run