Since GitHub repositories change often, you will want to insert the specific link you are referring to. If you are looking for the most popular one, it is usually a "Wave Simulator" or a "GD Physics Clone" repository (commonly created by developers like Cosmic1 or various community members).
Open-source developers usually write detailed guides on how to install the tool, Inject DLLs (if applicable), or run the scripts. geometry dash wave github
.controls-tip font-size: 0.75rem; color: #8e9ec5; background: #02061780; padding: 0.3rem 1rem; border-radius: 2rem; display: inline-flex; align-items: center; gap: 0.7rem; Since GitHub repositories change often, you will want