If I were younger I would love this. nowadays I spend most of the time tweaking websites to remove this stuff using local stylesheets...or using dark + read mode... how times have changed.
I like the fact that it gives animated feedback to emphasize what is happening/being altered. Native components don't always do that very well. Animations are not just artsy fluff, they have real UX value (if done right, of course).
I don't know. At the point in which you have to reinforce visual context with animations, I feel like you've already failed at the part of UX that actually matters. Like there's already been a cascade of structural failure, and now you're trying to put bandaids over it.
The animations, in this case, are not helpful. They distract from what you're trying to do. And components that don't give feedback are bad. It's trivial to have different color palettes for over, click, release, etc.