[fidotron]

Honestly, I think once you are tired of easing functions you are best off going to real physics. (By which I mean a simple Verlet integrator).

I've posted this before for other reasons but https://www.luduxia.com/showdown/ - in this case everything is easing functions, except for, bizarrely, the giant text that announces win/draw and the text inside the counter, which is done with actual physics because that proves better, especially with constantly moving targets.