I am submitting a Feature Request

Lack of description of the "-l" lock option in the man page.
The option is proposed when you type "cmatrix -h" to get help text, but anything in man page.

Request :
Complete the man page (and add the manner to quit this lock screen.)
Or suppress this option that force you to reboot if you don't know how to "unlock"

Tested on GNU/Linux Debian 10 Buster (stable)

thanks