Have you heard of build automation utilities? If you don't want to manage and compile your software and dependencies by hand with every release, you can rely on build automation utilities to compile and package your source code, manage dependencies, and run automated tests. Three build systems are predominantly used for Java development:
Of course, it is possible to just download the LITIENGINE .jar and import and use the library manually the "oldschool" way. However, we don't encourage using the manually downloaded library for your game project as managing the whole life cycle of your software is much more straightforward using a dedicated build system.
LITIENGINE itself is built upon Gradle and uses it to seamlessly manage its build steps and dependent libraries.
C:\Gradleand unzip the downloaded file there.
C:\Gradle\[your-gradle-version]\binto your system's PATH environment variable.
build.gradle, containing the build tasks, and
settings.gradle, containing Gradle settings.