MANUAL RUN: try the backrooms game on a real phone (touch controls, #568) #569

PR #568 added touch controls to play.html: a move stick, drag-to-look, and swat and jump buttons. They were only checked in desktop Chrome, in phone-sized iframes with simulated touch pointer events.

To check on a real iOS Safari and Android Chrome:

• the stick walks, and runs when pushed all the way
• dragging anywhere else looks around, and a second finger works alongside the stick
• swat: tap to swat, hold to press into a line in horde
• jump
• the page doesn't zoom or scroll during play
• the lobby card is reachable in landscape