Now I made 2 URLs
For PC or TV or VR(PC Steam with mobile Steam Link stream VR leanses browser to Mobile with PC controllers keyboard+mouse - here is disabled any touch events!)
For Mobile or Tablet (?mobile=true)
2 modes “gray button” zoom or joystick.
First is zoomed mode. Generate maze. Than zoom camera near Ball. Than switch into joystick mode.
When fall off and you have to reload from latest 5 points you must switch from joystick to zoom. Select restart point from menu and switch into joystick again.