Mycelium
Plant spores with your hand; a living network filaments outward on its own, remembers everything it grew, and rings when you touch a strand.
Grow a web of light
Tap and drag to plant spores and scatter nutrient — luminous filaments will grow toward it, branching and fusing on their own. Touch a living strand to ring its voice. The web never resets: it only accretes, so it is genuinely different minutes from now. If you do nothing, a gardener tends it for you.
Sound begins on tap