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'
> wasm streaming compile failed: TypeError: WebAssembly: Response has unsupported MIME type 'application/octet-stream' expected 'application/wasm'
Is this something you want to fix?