I took some hamfisted measures to allow the Web Assembly version of the game to be played on mobile as well, it's not very pretty but it kind of works. You can tap into the terminal to open your phone keyboard, then the terminal should be visible in the top half while the keyboard can stay open in the lower half. The tips section on the page has some further hints.

The port itself is quite crude but I made sure that it is ANSI C89 compliant, because I wanted the game to be able to run on just about anything.

For the best effect, I recommend playing the game using the aptly named cool-retro-term. https://github.com/Swordfish90/cool-retro-term

This is the best way to play short of hooking up your needle printer as a faux teletype terminal.