Historically, standalone overlays have been incredibly popular on GitHub. Various forks of GDHM and GDMegaOverlay provide floating windows that allow you to toggle cheats and practice tools mid-level.
What are you running? (e.g., Update 2.2) geometry dash mod menu github
The Geometry Dash community is split. Purists argue that using a mod menu to beat a Demon level is illegitimate because you didn't "earn" it. geometry dash mod menu github
Leo stared at the blank level select screen. Electrodynamix : 0%. Clubstep : 0%. Deadlocked : locked. geometry dash mod menu github