A simple and fun Minsweeper clone for the command line written in Ruby.
Start a standard 10 x 10 game:
$ ruby rubysweeper.rb
Start a 15 x 15 game:
$ ruby rubysweeper.rb 15
Start a 17 x 31 game:
$ ruby rubysweeper.rb 17 31
The minimum width and height is 10 and the maximum is 50.