Brain-even game https://asciinema.org/connect/251b3c0c-a2ba-42aa-ba3f-287543a8314a
Brain-calc game https://asciinema.org/a/cTydUpvFAQ4B8qcediaUdr00t
Brain-gcd game https://asciinema.org/a/fvwdk7PEWuPdb7bbkm481ycXv
Brain-progression game https://asciinema.org/a/F0h6AvVXTyCGsOBzz5c8Et5IM
Brain-prime game https://asciinema.org/a/gAz2250zFvpUOJK4zzG0OnJOh