Nice! For people who don't get the reference in the name Zanellati gave,
https://en.wikipedia.org/wiki/Tohu_wa-bohu
Edit: I didn't realize that, as Wikipedia says, this Hebrew phrase is used as a loanword in several European languages to refer to disorder, which in turn explains why Tatham called it "Unruly".
In the manual: "This puzzle type was invented by Adolfo Zanellati, under the name ‘Tohu wa Vohu’."
[1] https://www.chiark.greenend.org.uk/~sgtatham/puzzles/
[2] https://chris.boyle.name/projects/android-puzzles/ or https://f-droid.org/repository/browse/?fdfilter=puzzles&fdid...