Speaking of Snake game, if you want to go even deeper, you can try to use the wgpu crate to combine Rust and WebGPU to write everything from scratch. Here is the tutorial:
https://sotrh.github.io/learn-wgpu/#what-is-wgpu
I once wrote a code editor with wgpu, from font rendering to char/line state management (very rough) for music live coding:
https://github.com/glicol/glicol-wgpu
It runs in browsers, even including Safari!