Ah interesting. I remember someone else in the Discord noting that doing some easing on the movement caused some motion sickness for some people.
As a secret hack... if you press F12 to open the debugger, click the console tab, change the scope from the default "top" down to "index.html", and then run cmd('pixely 1') it'll effectively disable the CRT filter (or cmd('pixely 0') if you're a madman and want weird pixel textures in a high-res viewport...). I'd be curious to know if that helps =).