In case you don’t know, this is the app called Block Puzzle (on Android). After 7 years of puzzling, I managed to finally solve the last remaining puzzle (#491) on 24. 10. 2019 at around 14:49 – in an airplane flying from Dublin to Paris. Perhaps as decadent as it gets.
I already asked the person who introduced me to Block Puzzles not to show me any more puzzles, thank you very much.
Anyway, done and happy with it.
