Molecular Assembler: Mechanosynthesis Simulator (2D)

This is the 2D counterpart to the 3D mechanosynthesis scene: the same positional pick-and-place chemistry — a rigid manipulator tip that carries one feedstock atom at a time to a target lattice site and bonds it only when the placement error lands inside a Gaussian acceptance window — drawn as a flat top-down diagram instead of rendered spheres. Tune tip rigidity and feedstock temperature to see how mechanical and thermal noise trade off against build yield, switch between a triangular close-packed and a square target lattice, and watch live success-rate and per-attempt bond-probability readouts as the structure grows atom by atom.