Split on ✦: one mixed droplet, even amounts, two open neighbors. Both halves keep the same recipe.
Inside the atelier
Merge adds the amber and blue units. A collector accepts only its exact recipe. Each move or split costs one pulse. Undo is unlimited; hints show a shortest route from your current position.
Keyboard: Tab to a droplet and Enter to select; arrows move it. H splits horizontally, V vertically, U undoes, R resets. All chips are available. Progress saves on this device.
Inspired by 2026 electrowetting research. These are fictional puzzle rules, not a laboratory simulation. OpenDrop is a research reference only; no upstream code or assets are used.