Some of the puzzles can have multiple answers.
I won't give the puzzle number to try to avoid a spoiler/cheat.
I typed crescent for the answer on one level. I looked it up on a walkthrough later when I read a comment on that specific puzzle, and the walkthrough said the answer was moon.
196 moves. used the walkthrough for 10-11 though. One of those obvious things that you overlook until you see someone else do it. Loved the game though, would like to see another with a level select option.