If you see a "Geometry Dash FitGirl Installer" on YouTube, it is likely a disguised with the famous "FitGirl green installer" skin to attract clicks. Watch the video carefully—usually, the creator will still tell you to "buy the game first."
Here’s a useful, balanced review you can copy, paste, and tweak as needed. It covers performance, installation, antivirus warnings, and comparison to the official version. fitgirl repacks geometry dash