Spectral Horn

by Filip Paulů · #puzzle #physics #casual · 📱 Mobile-friendly

A real-optics puzzle game: steer a crystal unicorn horn to refract, disperse and totally-internally-reflect light into colour sensors. Snell's law, Cauchy dispersion, prisms, mirrors and lenses, all simulated. Winner of js13kGames 2026 (#1 overall, #1 innovation).

Controls: Drag the unicorn to move, drag the ring around the horn to rotate it, use the ↺/↻ buttons for fine steps. Touch supported.

Original game by Filip Paulů. License: MIT. Source code: https://github.com/ingSlonik/spectral-horn
Made for js13kGames 2026 (entered by the 2026-09-13 deadline; results 2026-10-05; #1 overall, js13k 2026).
Hosted on PlayPage with credit; see ATTRIBUTION.txt and LICENSE.txt in the game files.

Original game by Filip Paulů. License: MIT. Source code

▶ Play Spectral Horn · More games on PlayPage

More games like Spectral Horn

• Word Forge — Drag adjacent letters on the stone and forge real words. Longer smithing pays in gold — you have 90 seconds. · 📱 mobile-friendly
• 2048 — Slide numbered tiles on a 4x4 grid; equal tiles merge. Reach the 2048 tile before the board fills up. · 📱 mobile-friendly
• Hexalign — Rotate the nested hex rings until every spoke is a single color. Spend your moves wisely. · 📱 mobile-friendly
• Bubble Link — Pop a cluster of two or more like-colored bubbles. Chains rain extra points — do not let them crest the line. · 📱 mobile-friendly
• Tiny Yurts — A calm little strategy game inspired by Mini Motorways (js13kGames 2023, 4th place). Draw paths between… · 📱 mobile-friendly
• Hextris — A fast-paced puzzle game inspired by Tetris, played on a spinning hexagon. Rotate the hexagon to stack… · 📱 mobile-friendly
• Prism Memory — Watch the prism flare, then replay the light. One wrong facet ends the sequence. · 📱 mobile-friendly
• Chroma Shift — Slide rows and columns until colors line up. Clear clusters — do not let the grid fill. · 📱 mobile-friendly