> I kept tilting my head because it was hard to see the clue and interpret it at the same time.

Agreed, I definitely found myself doing that.

> The final clue I had to complete was that tricky .(.)(.)(.)(.)\4\3\2\1.

Interesting...I think I had the main guts of that one worked out when I was about 1/3 of the way through, but admittedly I did take a screenshot and mark it up in order to keep track of the various possibilities. It was (...?)\1* that tripped me up because I had an overly broad interpretation of its mechanics.

I wonder if it would be possible to record a bunch of 0-100% runs and then to make some sort of visualization to demonstrate different approaches...