Before you get started, there are 2 things you are going to need installed on your machine:

• git: If you’re using a Linux distro you’ll likely already have this installed on your computer. If you’re using Windows or another OS that doesn’t have git pre-instralled, you can download it here.
• python: If you’re on Linux, you should be able to use whichever package manager your distro uses to download it. If you’re on Windows or don’t want to use a package manager, you can download the latest version here.

On the github page you linked, you’re going to need the circled URL:

Open a terminal an navigate to the directory you want the code files to live in. Run the command git clone <URL>, with <URL> being the URL you copied from the github repo. To start the app, run python typewriter.py. Note that this command will only work if you are in the same directory as the python file. This means, for instance, if you are in /home/makan/ and you store the file at /home/makan/Typewriter/typewriter.py, you’ll need to run python Typewriter/typewriter.py. There are ways to make shortcuts to the program, but that will vary both by OS and what kind of shortcut (e.g. terminal command that can be used in any directory, desktop icon, etc.).

A final thing to note is that if the project receives any updates, you can download them with git pull. However the last change was 2 years ago, so there might not be any updates.