If you're interested in , consider looking into Geode — an open-source mod loader for Geometry Dash that is safer, community-vetted, and doesn’t cheat online progression. But even then, avoid any “all icons unlocked” or “noclip” mods if you care about fair play.
While RobTop added some practice improvements in the base game, the 2.2 mod menu takes it to a professional level. Features like and Show Hitboxes are essential for anyone tackling Extreme Demons.
: Allows the game to run at high refresh rates (above 240 FPS) even on 2.2's new engine. : A high-quality, free and open-source
Install the Geode installer and follow the setup for your platform (PC/Steam is most common).