Answers for developers, publishers and site owners on monetizing and distributing web games.
337 posts
Run a stateless WebSocket server that assigns each connection a player ID, puts players into room objects held in server memory (or Redis for multiple servers), and matches players by queueing them and pairing on shared criteria before creating a room and broadcasting join events.
Create a native WebSocket object in your game's JavaScript code (not inside Canvas draw calls or a Phaser Scene's render loop), listen for open, message, close and error events, and feed incoming data into your game state so Phaser or your canvas render loop just reads updated values each frame.
Client prediction moves the local player immediately without waiting for the server; server reconciliation corrects that local state when the authoritative server update arrives, replaying unacknowledged inputs; interpolation smooths remote players' positions between the delayed snapshots you receive over WebSockets.
Use a viewport meta tag setting width=device-width, initial-scale=1, maximum-scale=1 and user-scalable=no plus CSS that locks the canvas to 100% of the viewport, disables touch gestures with touch-action: none, and removes default margins and overscroll.
Use a WebSocket server (Node.js, Elixir/Phoenix, or Go) holding authoritative game state per room, broadcasting deltas at a fixed tick rate, with clients rendering via Canvas or WebGL and reconciling with client-side prediction. Language matters less than a clean room/tick architecture.
Godot 4 HTML5 export runs on the browser's WebGL implementation, so use the GL Compatibility rendering method for your export. The Forward+ renderer used for high-end desktop/console builds is not available in web exports.
Threaded Godot web exports require two HTTP headers: Cross-Origin-Opener-Policy: same-origin and Cross-Origin-Embedder-Policy: require-corp. These response headers enable SharedArrayBuffer in the browser, which Godot needs for web worker threading. If your hosting provider cannot serve custom headers, disable threads in your export preset so the game runs everywhere.
Since Godot 4.3, web exports use the Web Audio API for sound by default; you can switch back to Godot's own audio system in export settings. iOS Safari adds extra constraints (audio needs a user gesture to start, WebGL/memory limits are tighter), so test on real iOS devices, not just desktop browsers.
Unity 6 WebGL runs in current desktop and mobile browsers that support WebGL2, but real playability depends on the device's GPU, CPU and memory, not just the browser. Test on actual phones and tablets, not only desktop Chrome, before shipping.
Unity WebGL runs on iOS Safari because Safari supports WebGL, but performance depends almost entirely on build size and memory use, not raw rendering speed. Keep the build small, test on real iPhones, and treat load time as the main risk.