Some mods—especially those that manipulate save data or unlock all achievements—can corrupt your game save. Always before installing major mods.
Go to your Android Settings > Security and enable "Install from Unknown Sources." Geometry Dash 2.1 Mod Menu
Ultimate Guide to Geometry Dash 2.1 Mod Menus: Features, Safe Installation, and Risks Some mods—especially those that manipulate save data or
: Creators benefit from Advanced Scaling , Auto-Saving , and Template Building , which streamline the often-tedious process of level construction0;7c9;. 18;write_to_target_document7;default0;159c;18;write_to_target_document1a;_rXTuaf70F-Ow4-EPzIGnuQc_20;2a; How to Install and Stay Safe 0;16; 0;145;0;673; and Template Building