It doesn't work now

Just, before building, extract project/emscripten.zip to the folder emscripten, so that there are both these folders:

• project/emscripten/embuilt
• project/emscripten/emscripten-libs Extract ursina.tar.xz too, so that you get these files:
• src/ursina/audio/...
• src/ursina/editor/...

For production games, I made a simple tool called project/scripts/minify_html.py. It converts the /built/index.html into a minified version of it, so that you don't have to download a lot of data. For the base html, it gives ~41.1% of compression. (This is still in development)