Hi! A while ago I launched bigboard.games : free multiplayer games for 1-4 phones or tablets (or more for some games) lying next to each other on a table. The devices act as one big board, so for instance in Air Hockey the puck slides off one screen and onto the next.

It all runs in the browser, free. Any mix of iPhones, Androids or tablets plays together. You can add it to the home screen if you want (as a PWA).

Gameplay goes device to device over WebRTC. On the same Wi-Fi the devices find each other and join by themselves. Otherwise you scan a QR code or type a four-letter code, and if they can't reach each other directly (on mobile data, say), a relay connects them.…