Puzzle
I prefer jigsaw puzzles.
A Puzzle or a Riddle is a problem that requires an answer, some puzzles are puzzles to us because we do not always know the answer.
the puzzles have ended
the puzzles are done
Jigsaws consist of pieces that fit together A puzzle is a wider term that includes jigsaws and many other puzzles, for example matchstick puzzles and crossword puzzles.
The plural possessive is puzzles'.
Only if you invented that puzzle.
Puzzle builder
a puzzle lover
The correct spelling is "puzzles".
Puzzle No 3: Wrong Clocks, in the weekly Pandora's puzzles. Please see the Related link below for a walkthrough of puzzle 3, weekly puzzles.