I think Havoc physics will be a very welcome addition. Threejs has an adjacent library based off of bullet physics -- a solid library, but one that can be a bit finicky to set up. Although, physics engines are inherently difficult to work with in the first place.
As a technical 3D artist, Babylon has been a great way to dive into web dev, and it parallels with standard game engines just enough that I can easily find my way around the documentation.
>I think Havoc physics will be a very welcome addition
No kidding. The "Physics" in Babylon.js is at the inexcusably "my first game engine" level of incompetence. Velocity and acceleration are treated as if they have the same dimensions. All kinds of deeply embedded movement code lacks any understanding of world time. You can definitely get a little game going quickly in it because you don't have to think about any "hard" things, but when you try running your game on systems whose frame rates differ wildly you suddenly understand why real game engines care about the fact that velocity is measured in units of m/s and acceleration in units of m/s^2, and that it matters whether you build your art assets at meter scale or centimeter scale or etc.
Hi. I'd like to leverage your experience to ask for a JS game engine suggestion for a 2D game that I plan to publish on web and mobile.
I'd like to use something lighter than Unity or Godot.