Web

Download the Lua bundle for web and unzip it. Three files are the runtime, and data/main.lua is your game:

my_game/
├── data/
│   └── main.lua
├── natiny.html
├── natiny.js
└── natiny.wasm

Serve the folder over HTTP and open natiny.html. Any static server does:

python -m http.server 8000

Then go to http://localhost:8000/natiny.html.

It has to be HTTP. Opening the .html from file:// fails: a page cannot fetch its own files that way, and data/main.lua is fetched rather than read.

The window becomes the page's canvas, so natiny.window.create gives you the canvas rather than a new window. Everything else in the script is the same code that runs on a desktop.

WebGPU is the only backend here. It needs a current Chrome, Edge or Safari; Firefox is still behind a flag at the time of writing.