Also reminder that it works with mconnect [1], an implementation in vala.
I'm linking a fork since the original repo hasn't seen any recent commits (at least in master, looks like the owner has been trying to rewrite it first in Rust and now in Go)
I quite liked typingclub [0]. It's separated in levels and from time to time includes typing based minigames. It incrementally includes letters every couple of levels and makes you practice with words that only include what you learned so far.
Is there any real use case of having filenames with newlines? Everytime I recall that we have to design programs around that I wonder why it's possible in the first place.