install brain games

https://asciinema.org/a/ldwWCl3WvohEHb1njqyB5tFIo

$ git clone https://github.com/antiyvt/backend-project-lvl1/
$ sudo npm -g install backend-project-lvl1/

play game brain-calc

https://asciinema.org/a/D2DQ2F2x8kf7a9mExrMrFEDFB

$ brain-calc

play game brain-gcd

https://asciinema.org/a/yWYyFcuzkQnejbG0XYRWasGZ0

$ brain-gcd

play game brain-progression

https://asciinema.org/a/2shZcmyezHreBgxoHhFO6UQNc

$ brain-progression

play game brain-prime

https://asciinema.org/a/gTwTvmHlCSoH6vNC2M471vwCz

$ brain-prime