[c3RlcGhlbnI_]

This is really bad for getting better at typing for code in the same way all other typing tutors are.

The problem is that programming overuses a bunch of character sequences that rarely come up in standard english and thus in most of your typing practice, e.g. special characters, and mid-word capitalization. If you want to improve your typing speed for programming faster than you would just writing code normally you have to focus on those sequences.

You would probably want to practice with something that looks more like obfuscated code than beautifully formatted segments. Ideally you could even generate such segments so as to work out your least performant two character sequences while not slowing you down too much by being too random looking. Though even just repeatedly typing "jf" then random characters using the right pinky will be more helpful than this or https://typing.io