overdue: code, code_generator, code_matcher, game_repl
Just past fuxed
Clean up on game, game_repl, code gen. Set up for difficulty next.
moar difficulty levels
Beautification
Adds guess validation
Adds tests, Rakefile, and ability to quit at any time
Adds guess characters validation
Change correct_positions from array to int & adds ascii art
Removes Loopception
Fixes endless game issue after updating correct_letter
Final