I finally got around to playing a bit of this very early 3D platformer. It controls weird, but it does have 3D platforming. It is also a mysterious and confusing open world game, and I have no idea what I'm doing.
Screenshots marked with 🍒 are created by syltefar and are considered public domain, free to use for anything. If you want to, you can note where you found it and link to this page.