For those looking to build their own features, the GitHub Game Off community frequently highlights these open-source and professional engines: : Lightweight and versatile for 2D/3D. Phaser : The go-to for browser-based arcade games. Bevy : A modern, performance-focused engine written in Rust.
You can contribute, fix bugs, or even fork the project to make your own version. Deployment: Most are hosted for free via GitHub Pages .