The "shriveling_world" project aims at producing images of the global geographical time-space, using the third dimension, as in time-space relief maps. The word "shriveling" was introduced by Waldo Tobler in his comments of Mathis-L'Hostis time-space relief image, in order to describe the complex contraction process suggested by the model.
In README.md the Step #1 link leads to https://theworldisnotflat.github.io/shriveling_world_documentation/
It should allow direct access to online app.
The "Application" tab in the documentation also leads to a 404 error.