This is the source code of the last compiling build. It is not a complete game nor a demo, it is just a debug build for testing. You will need basic programming skills to make it work, like knowing how to use an IDE. I recommend you to use IntelliJ Idea for debug. You will also need Java JRE and JDK.
Import the code to your IDE using this Github repository, and then switch to the “LastBuild” branch.
Other branches may not be compiling or stable, even so, feel free to download them.