Hi, as with most open-source projects, 100% of the code that is part of our game can be found in the src folder in the repository. The assets are contained in the assets folder. The release on github is directly hosted on itch and on a dedicated website. If you want to build the game yourself, you will have to download and install Godot 3.4, which is the game engine our game is running on (also open-source). Given that the releases we put out on github are built targeting WebGL, you first have to host a local server in the uncompressed folder containing the build files, as is explained in the release notes. Then make sure that you click the window your game is running on before playing if it auto-opens (as with all browser applications). The game is currently part of the Swiss middle-school curriculum in one of the regions of the country and so it has been tested and works on 100+ different systems. I hope that this information helps clear up your confusion. Have a nice day.