Heavy development is underway, so expect bugs, crashes, and strange errors! I am hoping to get out a stable release soon!
Download source code and run.
You will need to supply an alternate Geometry Dash AppData folder. This is the platform I use (as an arch user) so this will be the most tested version.
I do not own a Windows computer, so all testing will be done via a friend's computer. Expect more bugs. You can find executable in the releases tab or can download and run the source for a more updated version.
I do not have any access to an Apple computer, so all support is theoretical. While it should work on MacOS with an alternate Geometry Dash AppData folder when run from source, there will be no support for this version.
Put url of the nong file in url box, or if the Youtube Link checkbox is chosen then the url of the Youtube video. Put the id of the song it is going to be replacing in the NG ID box and your Geometry Dash Appdata folder path in the GD AppData box. (If you are on Windows you should not need to change this)
Under construction... Come back later :)
For now just report the issue and I will see how I can help.
Just make a fork and add your changes! I would love any help that I can get.