Hexlet tests and linter status: 
CodeClimate status:
Demonstration how to do it: https://asciinema.org/a/fThHf95eGjSO1bdOgIeywIHDG
Every playthrough shows example of win and loose in game.
- Brain Even - https://asciinema.org/a/CSSENdjezc9zkVOBU6oUiAj5W
- Brain Calculator - https://asciinema.org/a/jx6i0drGvsFhKLH3dviBmrIE1
- Brain GCD - https://asciinema.org/a/fWDMPFiiRmUpssKarhOlcyq8M
- Brain Progression - https://asciinema.org/a/Fr3Bj5vscjgf7Pnz5SZzJeEoR
- Brain Prime - https://asciinema.org/a/3aqOiQahMdNh6VGIlVX1GWaNz