The maintainer changed a path, fixed the code (https://github.com/sgi-demos/sgi-demos/issues/2#issuecomment...), but forgot to update the readme. I have submitted a PR. Here are the fixed links with the original commentary:

---

Working demos

- Buttonfly: https://sgi-demos.github.io/

- Bounce: https://sgi-demos.github.io/sgi-demos/demos/bounce/web/bounc...

- Ideas: https://sgi-demos.github.io/sgi-demos/demos/ideas/web/ideas_...

- Insect: https://sgi-demos.github.io/sgi-demos/demos/insect/web/insec...

- Jello: https://sgi-demos.github.io/sgi-demos/demos/jello/web/jello_...

- Logo: https://sgi-demos.github.io/sgi-demos/demos/logo/web/logo_fu...

- Twilight: https://sgi-demos.github.io/sgi-demos/demos/twilight/web/twi...

Somewhat working demos

- Flight: https://sgi-demos.github.io/sgi-demos/demos/flight/web/fligh... (cockpit glitches, planes too slow in web version, night mode 'shimmers', no network play")

- Newave: https://sgi-demos.github.io/sgi-demos/demos/newave/web/newav... (no mesh editing, no popup menus, only wireframe)

- Arena: https://sgi-demos.github.io/sgi-demos/demos/arena/web/arena_... (no network play)