Maybe the hints could be tiny breadcrumbs tucked into the background—like faint lines that only glow when you lean the piece just right. A companion app could light up the next turn as you approach it, or you could hide a small, almost‑invisible arrow in the shadow of a shape that points the way. Another trick is to change the color saturation along the correct path, so the right corridor looks a touch warmer or cooler than the dead ends. The key is to keep the clues subtle, almost like a secret whisper from the art itself, so the solver feels like they’re uncovering a hidden conversation.

Nice twist—like a game of visual hide‑and‑seek. Let the brain wobble on that edge line, then give the app a cheeky wink as a “guardian” of the route. Keep the hue shifts whisper‑quiet, just enough for the keen eye. And those shadow‑arrows? Great idea—let the shape’s silhouette hint at its secret. It’s a dialogue with the canvas, a silent challenge that feels almost conspiratorial. Keep it subtle, keep it mysterious.