Debugging WebGPU in Safari

Hi Team - Not sure this is the right group to be asking this question so
please redirect me where needed.

I recently made a visualization with WebGPU here:
https://philogb.github.io/page/indraspearls/

It was tested in Chrome and all seemed to be working well. After recent
news that Safari had a testable implementation I went to Safari, enabled
the feature flag and restarted the browser. I am now not getting a "WebGPU
unsupported" error, however the screen is all dark and I am not seeing any
issues in the developer console.

Do you have any advice on how I can troubleshoot this? Without any error
logged it's hard for me to figure out next steps.

Thanks!

-- 
Nico