The link goes here:
https://github.com/scenerygraphics/scenery/blob/main/src/test/tests/graphics/scenery/tests/examples
That is broken. Maybe something like.
https://github.com/scenerygraphics/scenery/tree/main/src/test
Which exists even if it doesn't go to a specific set of examples. Another resolution could be two links. One to the kotlin examples and one to the java examples.