Play Flash games on mobile with Ruffle Virtual Keyboard

ed253 — Sat, 26 Jul 2025 06:05:16 +0000

Play Ruffle (Flash) games on mobile with the new Ruffle Virtual Keyboard userscript!

The userscript adds an onscreen virtual keyboard to Ruffle games. Tap the arrow key and spacebar buttons to play Ruffle games on mobile:

How it works

The userscript adds HTML buttons to the screen to represent arrow keys and spacebar. When pressed, the Ruffle container is focused, and then a dispatchEvent with a keyboardEvent is sent to the Ruffle container:

document.querySelector("ruffle-embed").focus();
document.querySelector("ruffle-embed").dispatchEvent(new KeyboardEvent("keydown", { key: " ", code: "Space", keyCode: 32, which: 32, bubbles: true }));

The virtual keyboardEvent is processed in the same way as a keypress from a physical keyboard

Now you can play your favorite Flash games on mobile!

Repo

https://github.com/ed253/ruffle-virtual-keyboard/

Install

Install a mobile browser that supports addons: https://play.google.com/store/apps/details?id=org.mozilla.firefox&hl=en-US
Install Ruffle addon: https://addons.mozilla.org/en-US/firefox/addon/ruffle_rs/
Install Tampermonkey addon: https://addons.mozilla.org/en-US/firefox/addon/tampermonkey/
Install Ruffle Virtual Keyboard userscript: https://greasyfork.org/en/scripts/543622-ruffle-virtual-keyboard-for-mobile
Enable/disable the userscript to toggle the keyboard

Extend

You can add new keys and change the color, size and position of the keyboard by editing ruffle-virtual-keyboard.js or opening the userscript in Tampermonkey

TODO

Make the keyboard draggable and resizable
Support different keyboard layouts and gamepads

Tips

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License

MIT

DEV Community: ed253