Thanks glad you liked it! It's actually not a port but is running on DOS via https://js-dos.com/, same as Doom and Jazz Jackrabbit. I actually have my 8 favorite Shareware games on my website which can all be played.
Seems like a proof-of-concept that an online platform for many old DOS games can be implemented... Guess I have a new project to add to my (very long) to-do list :)
I haven't played Commander Keen in almost a decade. Fascinating to see someone port it into a website.