You forgot to turn off wallhack. Git gud.

This warning originates from the test suite, where random sampling from a set is performed. In the latest python version, this is a deprecated feature. A fix is in order. EDIT: a fix ha already been published.

At least you understand the description, I can't make anything of those "invalid paths" cases. When I follow the directions from the mouse's position, I end up inside walls or outside the frame.

yes

Well this is strange. For me, it was not only posible to check for invalid paths of "C" type, but also the site did not seem to intentionally slow down anything for me. Interesting. At some point, the site apparently went malicious.

Why would they have to be iterable to extract x and y from them?

Description says: "Point objects have attributes x and y." - you need to access the attributes to read their values.