The web build is available, I've still got some performance issue but it's playable. Still investigating.
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I will check out yours as soon as I can!
For the snake, I store the position of the snake head every frame and place the following body parts accordingly using a gap in relationship with the moving speed.
Path/Path2D is very useful but I tend to avoid using the PathFollow as it can be really restrictive. For the car I'm using the path but I made my own implementation for the follow so I can handle physics in a better way.