VSCode stores its project-specific settings in a. This automatically installs the Haxe extension as well. Go to the Extensions tab and install the Lime extension. Download and install the latest version of Visual Studio Code.You can find detailed documentation for the Haxe extension in the Wiki, this page focuses on the Flixel-specific parts. The Haxe extension seamlessly integrates with the compiler's IDE services and uses them for: Visual Studio Code is an open-source, cross-platform, lightweight code editor by Microsoft.