Hi! Honestly, that is very interesting. You can possibly do some sort of animation if you attach several images as fields to an event and then run a script that displays them using some sort of delay (we did that in Matter for an actual cutscene).
However as binksi/bipsi is based on javascript, it's single-threaded. So the animation will play once, you'll have to add each manually, and everything will stop until that animation is done. So a looping animation like the ones you'd see in Ren'Py is impossible.
I love the idea but it's probably not worth the hassle. Binksi wasn't originally meant to be a VN engine but I still made this, so I get why you wanted to try LOL