Learn the basics on how to write a game in LibGDX, which can then be exported to Android, iOS, HTML, and the Desktop!
The sample game here is the same game we made in the CreateJS workshop. The point isn't to learn more game development math tricks, but instead to see how another engine works, as LibGDX is much more bare-bones than CreateJS. Therefore, there will not be any explanation of the math. If you would like to learn more about the math being done, you can look at the CreateJS workshop source.
All of the learning is done by looking at the code and reading the paragraph-long comments.
First, to download LibGDX, grab the latest release here. Inside the folder you download, there's a jar file that helps you setup your game. To start it, navigate to the folder in the terminal and run java -jar gdx-setup-ui.jar. The app will carry you through the rest of the setup process. For much better, more detailed instructions, go here!