Website looks like an old footage has been found

I have a demo website that I would like to share, but the look of it is strange. Seems like somebody has found old footage. I thought it was chrome’s fault but it the same in Safari and brave. Nothing wrong in the designer .

Any idea?

Here is my site Read-Only:
(how to share your site Read-Only link)

The site online:

You have a canvas called “noise” that goes over everything with a z-index of 999999999 on the site. It seems like you’re running a script that creates the noise?

2021-07-22 15_14_15-000190

Thank you for your time @Fonsume.
I have cloned a style guide. Guess that came with it. Well, I just going to do it again without it.