Here is an article that advocates for Norton Commander-like keyboard graphical interfaces (and in general, reconsidering how we use computers for everyday tasks).
Ignore the fact that this is a long article about what tools are better suited for particular tasks, written as a sequence of tweets.
I agree that keyboard interfaces are faster to use once you get used to them than interfaces based on screen buttons. Also, Screen buttons, if you think about it, sound a little unnatural: you have a bunch of physical buttons already, why would you draw a fake physical button on the screen, that doesn't give you any tactile feedback, and then animate it so that it gets better at pretending that it's a real button and gives you at least some visual feedback?
On the other hand, I used Norton Commander as a child (not having decades of practice using a mouse), and I remember that it was still tremendously easier to use it with a mouse than with a keyboard. So, I'm not sure that the difficulty of keyboard interfaces is caused by absence of experience compared to mouse. I think keyboard interfaces might still be inherently more difficult to learn than mouse interfaces. I should probably look up some studies on this sometime.
Maybe sometime later I will implement a keyboard-only interface as an option for this game or another game of this kind. I don't know how to make pattern input convenient on keyboard, though.