When you launch the game, you are asked to prompt the names of the players.
Then the rules will be briefly explained to you and the game can start.
Also, at the end of the game, you will be asked if you want to play again.
Press the "Y" key to do so.
Have fun playing Tic Tac Toe
To start the game execute the file game.rb
PS: if you do not have pry, type gem install pry