MunosA small language for big nostalgia

Read game memory, draw overlays, and go multiplayer — all from one file that runs in the browser and on the server.

JavaScript on the outside

Curly braces, familiar operators, type annotations you already know. If you've written a little JavaScript, you can read Munos on day one.

BASIC on the inside

No closures, no classes, no magic. Variables, conditionals, loops, and calls. The whole language fits in your head.

Networking is built in

send and receive are language primitives, not a library. One source file holds both the client and the server side of your mod.

Compiles to WebAssembly

Your script is compiled ahead of time and runs as native WASM — fast enough to do real work every single frame.

Hello, overlay

Here is a complete, working Munos mod. It draws a magenta square on top of the running game, every frame:

munos

on client {
    // A 32×32 solid block of palette index 1.
    var block: image = image_literal(32, 32, "AQEB…")
    // Index 0 is transparent; index 1 is bright magenta.
    var palette: u32[] = [0x00000000, 0xFFFF00FF]

    event frame(frame_num: i32) {
        drawImage(block, palette, 40, 40)
    }
}

That's the whole program. No build config, no imports, no main. The on client block runs in the player; event frame fires once per emulator frame; drawImage paints onto the framebuffer.

Ready to write your own? Start the tutorial →