An adaptive audio layer, not just background sound. Off by default.
preset
mode
soundscape
Hearing nothing on iPhone? Check the physical mute switch on the side — iOS Safari silences web audio whenever it's flipped to silent, the same as it would a video.
"Café" isn't offered as a soundscape here — every sound in this app is synthesized live (no audio files), and overlapping café chatter doesn't synthesize convincingly. Everything else above is a real, live-generated sound, not a placeholder.
Haptic fidgeting
Tap, hold, press, swipe, rub, circle, or drag on the surface below — each gets its own feel.
Your browser/device doesn't support vibration (this is normal on iPhone — iOS Safari doesn't expose it). The visual ripple still responds to every tap.