Been away for a few days (just returned, & haven't caught up yet!
), and got a new computer which badly needs urgent attention.
IIRC, you simply use the hand on the ladder ... I think this is the regular method of 'operating' something.
True, a more logical method would be to use the Shoes/walk (I think this is what you mean by the 'socks"). But you know point & click games ... they sometimes are a bit tricky.
BTW, there are 2 ladders you have to climb ... both the same way.
If this doesn't 'work' I think something's wrong with your download