Thank you for your report about what you found out about the glitches. The fact that the glitches can be also highlighted is a really interesting behavior. Unfortunately I cannot reproduce it on my system (Windows 10). I tried it with the browsers Chrome, Firefox and Opera (not with Edge since it does not support WebGL 2.0). I think I have to get a mac somehow.
Nevertheless I wanna thank you for your effort to upload the videos. As a dev it is always a rich (and sometimes painfully) experience to watch others playing your own creation. Especially if they play it more skilled than yourself.