SpottedcatLightweight cross-platform 2D/3D game engine

Small, fast, and a little wild—named after the rusty-spotted cat and built in Rust.

Build Flappy Cat

Play WASM Demo

Draw an Image

Build a real mini-game

Follow the Flappy Cat guide to add movement, input, obstacles, collision, score, restart, and polish.

Build Flappy Cat

Add 3D when needed

Enable model features for primitives, GLTF loading, animation, instancing, fog, and custom model shaders.

3D guide

Build for every screen

Ship to desktop, web, iOS, and Android from one codebase.

Platform guide

Use the tiny cat intro

Wrap your root scene with OneShotSplash for a built-in pixel-art Rusty-spotted cat startup scene.

Splash guide

Stable 1.0 release

Spottedcat 1.0 is the first stable release. Public API breakage is reserved for future major versions; minor and patch releases focus on compatibility, fixes, and additive improvements.

Minimal shape

Spottedcat apps are ordinary Rust types that implement Spot:

rust

use spottedcat::{Context, Image, Spot, WindowConfig, run};
use std::time::Duration;

struct Game;

impl Spot for Game {
    fn initialize(_ctx: &mut Context) -> Self {
        Self
    }

    fn update(&mut self, _ctx: &mut Context, _dt: Duration) {
        // Move your world forward here.
    }

    fn draw(&mut self, _ctx: &mut Context, _screen: Image) {
        // Draw your frame here.
    }

    fn remove(&mut self, _ctx: &mut Context) {}
}

fn main() {
    run::<Game>(WindowConfig::default());
}

Pick your next step

New to Spottedcat?Build and run your first window.Want the guided path?Build a complete Flappy-style game step by step.Want to feel it first?Play the finished WebAssembly demo in your browser.Want smaller demos?Try input, image, and shader examples as real Rust/WebAssembly builds.Need a snippet?Start with a focused image recipe, then jump to input, text, or splash.Want real code?Browse runnable examples with feature flags and commands.Shipping somewhere?Check desktop, WebAssembly, iOS, and Android notes.