When I did my first few programming courses we were using C and on Windows, and using system("pause"); was our way of keeping cmd from closing. So as a joke over the years I've made a pause script for Linux in Python, Perl and even bash just so I can make such code valid.

But putting a whole game in place of a standard Linux util sounds like awesome menace, reminds me of the sl command (steam locomotive) which you can install on Debian (and maybe other distros?) for those who may typo ls they'll get a fun surprise :)