When my kids were younger I created a Javascript based game to make learning and practicing typing fun. It was not as cool and full featured as this version below in Swift language.
Typo the game runs on MacOS Sierra through Tahoe; It is free to download without needing to give out your email or other info. You can see it in action below. The video does not go into all the of the features.
Want to see more details about TypoTheGame? Check out the readme.txt file.