Implementation of a RegExp crossword.
View the current version at http://jimbly.github.io/regex-crossword/
Original puzzle written by Dan Gulotta for the 2013 MIT Mystery Hunt: https://web.mit.edu/puzzle/www/2013/coinheist.com/rubik/a_regular_crossword/ popularized through http://www.i-programmer.info/news/144-graphics-and-games/5450-can-you-do-the-regular-expression-crossword.html
- Auto-check against known solution
- Allow choosing between multiple crosswords puzzles
- Allow users to save their own puzzles and load other people's
- Track time spent solving puzzle
- Rotate buttons
- Undo/redo