Or the "Untangle" puzzle from Simon Tatham's Portable Puzzle Collection https://www.chiark.greenend.org.uk/~sgtatham/puzzles/
Constantly one of the first additions to any new device I acquire (Android, Linux, Windows).
How do you install this?
I am not sure I understand the question. Doesn't the "Download" section of the page provide links to the binaries for different platforms? https://www.chiark.greenend.org.uk/~sgtatham/puzzles/#downlo...