ASCIIpOrtal: A Portal Game You Can Play in Your Terminal (2019)

Not mine, but here's a video demonstrating the game:

https://www.youtube.com/watch?v=7ww2dGmjE2Q

If you're looking for a good spin-off, mari0[0] is a really fantastic Super Mario Brothers-meets-Portal game. I just wish development had continued and provided more levels.

[0] https://stabyourself.net/mari0/

Used to play this in class while in high school, definitely recommend.

I hold this one close to my heart, I was a beta tester for it and designed some of the puzzle levels (you can see me on the credits page there)

Screenshots? Video link?