base on Tiny fast HTML5 game engine with many features and no dependencies. # LittleJS - The Tiny Fast JavaScript Game Engine <div align='center'>  [![NPM Package][npm]][npm-url] [![Build Size][build-size]][build-size-url] [![NPM Downloads][npm-downloads]][npmtrends-url] [![DeepScan][deepscan]][deepscan-url] [![Discord][discord]][discord-url] </div> ## 🚂 All Aboard! LittleJS is a fast, lightweight, and fully open source HTML5 game engine designed for simplicity and performance. Its small footprint is packed with a comprehensive feature set including rendering, physics, particles, sound, and input handling. The code is very clean and well documented with many examples to get you started quickly. <div align='center'> ## [Demos](https://killedbyapixel.github.io/LittleJS/examples) | [Docs](https://killedbyapixel.github.io/LittleJS/docs) | [Trailer](https://youtu.be/chuBzGjv7Ms) | [Discord](https://discord.gg/zb7hcGkyZe) | [FAQ](https://github.com/KilledByAPixel/LittleJS/blob/main/FAQ.md) </div>  ## LittleJS Features ### ✨ Graphics - Super fast WebGL2 + Canvas2D hybrid rendering system - Apply [Shadertoy](https://www.shadertoy.com) style shaders for post-processing effects - Robust particle effect system and [effect design tool](https://killedbyapixel.github.io/LittleJS/examples/particles/) ### 🔊 Audio - Sound and music with mp3, ogg, or wave files - Use [ZzFX](https://killedbyapixel.github.io/ZzFX/) sound effect generator to play sounds without asset files ### 🎮 Input - Comprehensive input handling for mouse, keyboard, gamepad, and touch - Customizable on screen gamepad designed for mobile devices ### 💥 Physics - Robust arcade physics system with collision handling - Fast tilemap collision and raycasting - Full Box2D integration for realistic physics ### 🚀 Flexibility - Compatible with all modern web browsers and mobile devices - TypeScript and Module support with example projects for both - Great for size coding competitions like [Js13kGames](https://js13kgames.com/) - Open Source and [MIT licensed](https://github.com/KilledByAPixel/LittleJS/blob/main/LICENSE) ### 🛠️ Developer Tools - Live example browser with code editor - Debug overlay and primitive rendering system - Medal tracking system with [Newgrounds](https://www.newgrounds.com/) support - Node.js build system ## How To Use LittleJS To get started download the latest LittleJS package from GitHub or install via npm: ```npm install littlejsengine``` - [Making Awesome Games With LittleJS](https://youtu.be/_dXKU0WgAj8?si=ZDXLYAFDWp54hrGT) - A short talk about LittleJS with some tips on how to use it. - [Tutorial: Breakout](https://github.com/KilledByAPixel/LittleJS/tree/main/examples/breakoutTutorial) - Learn how to make a simple game from scratch - [Tutorial: Make a ski game](https://eoinmcgrath.com/little-ski/tutorial.html) - This tutorial by eoinmcg that shows how to make a pixel art style game. - [LittleJS Quick Reference Sheet](https://github.com/KilledByAPixel/LittleJS/blob/main/reference.md) - A reference sheet to help you get started. - [Little JS FAQ](https://github.com/KilledByAPixel/LittleJS/blob/main/FAQ.md) - Answers to common questions about LittleJS. - [JS13k Branch](https://github.com/KilledByAPixel/LittleJS/tree/js13k) - For size coding events like JS13k there is a special branch that builds to a 7KB zip. ## Examples LittleJS comes with a several demos both for learning and using as starter projects to create new games. - [Example Browser](https://killedbyapixel.github.io/LittleJS/examples/) - Live example browser with all examples - [Breakout](https://killedbyapixel.github.io/LittleJS/examples/breakout/) - Block breaking game with post-processing effects - [Puzzle Game](https://killedbyapixel.github.io/LittleJS/examples/puzzle/) - Match 3 puzzle game with HD rendering and high score tracking - [Platformer](https://killedbyapixel.github.io/LittleJS/examples/platformer/) - Platformer/shooter that loads level data from [Tiled Editor](https://github.com/mapeditor/tiled) - [Box2D Demo](https://killedbyapixel.github.io/LittleJS/examples/box2d/) - Box2D plugin demonstration and testbed - [Stress Test](https://killedbyapixel.github.io/LittleJS/examples/stress/) - Sprite rendering benchmark and music system demo - [Particle System Designer](https://killedbyapixel.github.io/LittleJS/examples/particles/) - Particle system editor and visualizer ## Builds | File | Mode | Module | Use case | |------|------|--------|----------| | [littlejs.js](https://github.com/KilledByAPixel/LittleJS/blob/main/dist/littlejs.js) | Debug | No | Debug mode with asserts | | [littlejs.release.js](https://github.com/KilledByAPixel/LittleJS/blob/main/dist/littlejs.release.js) | Release | No | Optimized for release | | [littlejs.min.js](https://github.com/KilledByAPixel/LittleJS/blob/main/dist/littlejs.min.js) | Release | No | Optimized for release and minified | | [littlejs.esm.js](https://github.com/KilledByAPixel/LittleJS/blob/main/dist/littlejs.esm.js) | Debug | ESM | Debug mode with asserts | | [littlejs.esm.min.js](https://github.com/KilledByAPixel/LittleJS/blob/main/dist/littlejs.esm.min.js) | Release | ESM | Optimized for release and minified | ## Games Made With LittleJS Here are a few of the many amazing games created with LittleJS... - [Space Huggers](https://www.newgrounds.com/portal/view/819609) - Roguelike platformer shoot-em-up game with procedural levels. by [KilledByAPixel](https://frankforce.com/) - [Black Cat Squadron](https://js13kgames.com/games/black-cat-squadron) - One button shooter based on a WW2 Navy squadron. JS13k 5th place! by [repsej](https://github.com/repsej) - [L1ttl3 Paws](https://github.com/KilledByAPixel/JS13K2025) - Cat glider with procedural art and levels for JS13K! by [KilledByAPixel](https://frankforce.com/) - [KleptoKitty](https://js13kgames.com/games/kleptokitty) - Cat themed heist puzzle. JS13K 22nd place. by [eoinmcg](https://eoinmcg.itch.io/) - [The Way of the Dodo](https://js13kgames.com/2024/games/the-way-of-the-dodo) - Single button platformer. JS13k 5th place! by [repsej](https://github.com/repsej) - [Undergrowth](https://undergrowth.squidband.uk/) - An interactive music videogame for the band Squid. by [KilledByAPixel](https://frankforce.com/) - [204Snake!](https://www.newgrounds.com/portal/view/960100) - A puzzle game that combines 2048 with snake. LittleJS Jam 1st place! by [Sodoj](https://sodoj.itch.io/) and [Shai-P](https://shai-p.itch.io/) - [GATOR](https://www.newgrounds.com/portal/view/960757) - Retro platformer shooter game where you rescue animals. LittleJS Jam 2nd place! by [eoinmcg](https://eoinmcg.itch.io/) - [A Hedgehog's Search](https://willsm1111.itch.io/a-hedgehogs-search) - Adventure game starring a hedgehog. LittleJS Jam 3rd place! by [willsm1111](https://willsm1111.itch.io/) - [Wendol Village](https://js13kgames.com/2024/games/wendol-village) - Warcraft inspired RTS game. by [sanojian](https://github.com/sanojian) - [Dead Again](https://js13kgames.com/entries/dead-again) - Top down survival horror. by [sanojian & repsej](https://github.com/sanojian/js13k_2022) - [Isletopia](https://store.steampowered.com/app/1861260/Isletopia) - Relaxing strategy game of greenifying barren islands. by [Gamex Studio](https://x.com/gamesgamex) - [Tetrimals](https://nixn.itch.io/tetrimals) - A puzzle game mixing Tetris with animals. by [nixn](https://nixn.itch.io/) - [Bug&Bee](https://itch.io/jam/littlejs-game-jam-2025/results) - Low fi shoot em up with co-op gameplay. LittleJS Jam 1st place! by [eoinmcg](https://eoinmcg.itch.io/) - [Little Platformer](https://psemo.itch.io/little-platformer) - Platformer with many mechanics. LittleJS Jam 2st place! by [PSEMO](https://psemo.itch.io/), [Solita666](https://itch.io/profile/solita666), [GabrielRG](https://gabrielrg.itch.io/), [Nate](https://natesassoon.itch.io/) - [Rogue Pong](https://itch.io/jam/littlejs-game-jam-2025/rate/4004165) - Roguelike crossed with classic pong gameplay. LittleJS Jam 3rd place! by [webdevbrian](https://webdevbrian.itch.io/) - [LittleJS Jam 2024 Results](https://itch.io/jam/littlejs-jam-2024/results) - All the games from the first LittleJS Game Jam. - [LittleJS Jam 2025 Results](https://itch.io/jam/littlejs-game-jam-2025/results) - All the games from the second LittleJS Game Jam.   [npm]: https://img.shields.io/npm/v/littlejsengine [npm-url]: https://www.npmjs.com/package/littlejsengine [build-size]: https://img.shields.io/bundlephobia/minzip/littlejsengine [build-size-url]: https://bundlephobia.com/result?p=littlejsengine [npm-downloads]: https://img.shields.io/npm/dw/littlejsengine [npmtrends-url]: https://www.npmtrends.com/littlejsengine [deepscan]: https://deepscan.io/api/teams/22950/projects/26229/branches/831487/badge/grade.svg [deepscan-url]: https://deepscan.io/dashboard#view=project&tid=22950&pid=26229&bid=831487 [discord]: https://img.shields.io/discord/939926111469568050 [discord-url]: https://discord.gg/zb7hcGkyZe ", Assign "at most 3 tags" to the expected json: {"id":"11503","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"