Copy Editor is a RegEx tutor within a puzzle game. Regular Expressions are used in computer science and language theory. RegEx patterns direct search operations and manage text. Novices and experienced programmers will enjoy the challenge of creating progressively more complex strings. In Copy Editor, review famous works and make changes to the text building on new Regular Expressions with each level. Use characters, scripts, and sequences to align your “Input” with the “Objective.” Begin the game with a few expressions and gather skills in combining operations. A fake Chat Box provides hints along the way. The Chat gives you additional options to select your level, find RegExp tips, and access Help if you are completely baffled. Copy Editor includes RegEx Help, linked to the open source “regular expressions 101” in GitHub. Whether you are new to using Regular Expressions or want to test your proficiency, Copy Editor promises a fun and challenging puzzle experience.