Obligatory "Torille!" as a fellow Finn.

Fun coincidence that you started this project, I've had this exact same idea brewing for a few years, but did not bite the bullet yet :D

Have you considered using Bevy as a base ECS as they have an automatic archetype (shape) handling in the library? This was essentially my original idea, to implement a JS runtime on top of Bevy. (And over the years slap together a browser after the JS starts working)

Torille!

I have not considered Bevy, no. I sort of assumed that it wouldn't be easy to adapt to (thinking that it is more of a game engine), though it might've well been an excellent option.

I _have_ thought about using Bevy as a rendering engine for some beautiful heap access animations. Imagine rows of little boxes, each row a heap vector and each box an item in it: The boxes blink as their memory is accessed. Oh what a sight it would be.