If your QR Code URL isn't working on mobile here's a tip to expose your game to the internet. Install NodeJS if you don't already have it. Any version should do Terminal: npm install -g ngrok Terminal: ngrok http 19050 This prints out some URLS: Forwarding https://52538faa.ngrok.io -> localhost:19050 Simply visit the ngrok.io url in your mobile browser and requests will be forwarded to localhost:19050! Working great for me here at my co-working space. Also cool if you want somebody to test outside of your local network. A few of my web security friends raised an eyebrow at this tool, so use at your own risk .