There is no specific term for a person who is addicted to puzzles, but some people may develop an excessive interest in solving puzzles, to the point where it interferes with their daily life. This kind of behavior is classified as "compulsive puzzle-solving" and it could be part of obsessive-compulsive disorder (OCD) or a compulsive disorder.
A master of puzzles is often referred as an expert in puzzles or a puzzle enthusiast.
Puzzle piece is often used as a metaphor for something that is missing or incomplete. The puzzle piece is also a symbol of autism, as the condition is often described as a "puzzle" with many missing or incomplete pieces. However, it should be noted that puzzle piece imagery is not used to represent all types of mental health disorders.
The puzzle piece symbol is associated with autism awareness, as it represents the idea that autism is a complex and multifaceted condition, and that each person with autism is unique and has their own strengths and challenges. The puzzle piece has been used by the autism community as a symbol of the mystery and complexity of autism, and the idea that everyone with autism is different and that it's important to understand and accept the diversity of the autism spectrum.