This is cool and reminds me of the old ascii art editors; although this appears more geared towards technical documentation than art.

Not sure why the title has to mention 144fps, which is of course dependant on the computer specs, the terminal emulator, and the screen rendering the program... If you've got a problem rendering ascii fast, I got news for you...

This is very cool.

If you can record some gif and embed it in the README.md, it'd be better

This is very cute! What kind of creations are you making with this? The examples show some loose diagramming, but the infinite canvas to me screams idea scratch pad?

effect of accidental development of a framework for GUI apps and personal sympathy toward diagrams