Sculpt the probability field |ψ|², then observe to collapse matter into existence.
Get the walker across the chasm to the green exit. Aim the crosshair where you want a platform — you can only collapse where the wavefunction is probable enough: the crosshair is green when allowed, red when not. Tune the emitters to brighten the spot you're aiming at. The dotted line previews the walker's path — green reaches the exit, amber falls short.
Click the canvas first so it has keyboard focus. Needs a WebGPU browser (Chrome / Edge, Safari 18+, recent Firefox).