↑ ↓ speed ← → star size [ ] star density W warp (streaks) C colour: white · rainbow · lilac · trans T tilt steering (phones) Space pause F fullscreen (or double-click) R reset ? / H this panel
touch: drag up/down = speed, tap = warp, "tilt to steer" = lean the phone, two-finger tap = this panel. wheel = speed. ← the galaxy version