Once a word is typed out completely, it disappears before hitting the ground. The faster you go, the more words that you save from getting eaten by Tux.
When you go to the main menu of the Tux Typing program for macOS, it lets you choose a level of difficulty. You can start out as a Space Cadet (easy) or go all the way up to Commander (hard). The various levels of difficulty will challenge you in typing complete words and letters of the alphabet. You will even be tested on which finger you use to type each letter. There is no feature to modify the word lists of the Tux Typing app, so you have to use the word lists that were programmed into it.
However, the developers of the software have said they’re working on an update to allow you to add your own wordlists, so look out for that in the near future. Several different languages are available in the software. Some are major languages, while others are less popular languages.
