There are still a couple of things that could be improved but I am happy with it overall. Top priority is adding the typing sound while hovering over the codes. I think it’s the most characteristic thing in those terminals. I used React, Immutable and Glamorous to build it.
Here’s the stuff https://thegallery.github.io/fo-terminal/
and here’s the code: https://github.com/TheGallery/fo-terminal