I didn't know how to trigger https://unit520.net/deadtrees/ at first (focus the page then use arrow keys). Oddly the first page load hung at a static canvas that stretched as I resized the window, while reloading worked. F12 showed a (false positive) warning:
> wasm streaming compile failed: TypeError: WebAssembly: Response has unsupported MIME type 'application/octet-stream' expected 'application/wasm'
Yeah, I'm aware of this error, it seems to be related to the shared hosting I'm using, I can't replicate it when serving locally. But as long as it is "falling back to ArrayBuffer instantiation" all is good, and I didn't investigate further because this fallback mechanism actually loads the WASM module faster than the "streaming compile" method (these things are provided by Emscripten).
I have no idea why it didn't load on the first try for you though.
> wasm streaming compile failed: TypeError: WebAssembly: Response has unsupported MIME type 'application/octet-stream' expected 'application/wasm'
Is this something you want to fix?