[garaetjjte]

>missed letters if you type too fast (though I suspect it's a bug)

It states it's intentional:

>Just like a real manual typewriter, you can only press one character key at a tim

I have never used typewriter, but I don't think this is correct, the limitation should apply only for adjacent keys, not globally for all keys. This is the whole point of QWERTY layout, to type faster by spacing letters in words as far as possible to avoid jamming typewriter.

[reaperducer]

Nope. Letters from almost any part of the keyboard could jam the machine if you typed fast enough. That was one of the reasons that the IBM Selectric typewriter were so popular with professional typists. The ball mechanism had nothing to jam against.