The fun and open source game library for HTML5 Games

Warriors! Level up the fun with our brand new Colyseus multiplayer guide!

KAPLAY (/ˈkæpleɪ/) is a JavaScript and TypeScript game library that makes it easy to create games for the web. It's free, open-source and fun.

Explore Docs Play in KAPLAYGround Join our Discord

Friendly API. Easy to learn, easy to teach.

A bunch of examples and assets to get started.

Strong support for TypeScript included.

It's Open Source, free and always will be.

An enjoyable API based on blocks

KAPLAY is a lot of fun to use and easy to learn. It was uniquely designed with blocks and functions to make it intuitive and engaging. Just take a look at the examples below and experience it for yourself!

Start game

kaplay({ 
  background: "darkSalmon",
  debug: true,
  burp: true,
  // and more uselful opts, like burp is 
});

debug.log("Press (B) button to burp!");

Add an object

const bean = add([
  sprite("bean"),
  pos(center()), 
  health(5),
  body(), // adds physics
  area(), // adds collisions 
]);

Kill destroy an object

setGravity(1000); 
bean.jump(); 

bean.onCollide("spikes", () => {
  bean.hurt(5);
  bean.destroy();
  shake(5);
  flash("#cc425e", 0.2);
});

Add custom components

// returns an object 
const spillTheBeans = (count) => ({
  id: "chaos", 
  add() { /* code */ }, 
}); 

add([
  spillTheBeans(30), // adds chaos :O 
]);

Say goodbye

const bubble = add([
    anchor("center"),
    pos(center()),
    rect(400, 100, { radius: 8 }),
    outline(4, BLACK),
]);

bubble.add([
    anchor("center"),
    text("ohhi, I mean.. oh bye!", {
        size: 26,
    }),
    color(BLACK),
]);

Plus many more simple and fun to use methods and functions

No more long nested methods like
obj.position.transform.translate(10, 20)

Get Started (Docs) Explore more examples

Voices of KAPLAYers

Don't just take our word for it, see what our users say about KAPLAY! We're proud to have such a great community.
Join our Discord to be a part of it!

Endel @endel

Colyseus.io, Brawlball.io & Mazmorra.io creator

KAPLAY API is incredibly intuitive and easy to read. I love how it combines simplicity with power, it’s a truly innovative library that brings HTML5 games to life!