What if he walked in a square patrol? That would essentially have the same gameplay I was going for but be more predictable. Do you think that would work? Or should I cut his patrol area in half like everyone else?

Sorry for the trouble!
I think a clear diagonal patrol would also work and still ...

Oh, there was also this tiny glitch: Floating foot.

Ah! And congratulations on being the first game on Linux that has rumble working on my setup!

I think the "listening cone" should be narrowed significantly when the enemy is still/listening, so one can at least freeze when he gets too close - which happens a lot due to his changing pattern.

Now that I tried again, I managed to get by him on the first attempt (without doing anything ...

I was spending half an hour earlier just trying to get past the place where there are two enemies in the same room in the mental hospital - I have no idea how to get past the second one :/

The text on the eye test was a great detail, more of those would be lovely; it might also be a good way to put ...