A standalone VR rhythm game for Meta Quest 3S built in Unity 6 with URP. Features a unique polyrhythm engine that simultaneously renders 4 geometric rhythm patterns (triangles/3, squares/4, pentagons/5, hexagons/6) drawn pixel-by-pixel on Texture2D — inspired by the musical concept of polyrhythms. Includes a fully interactive 88-key 3D piano (custom Blender model with individually named keys), FreePlay and SongPlay modes, JSON-choreographed songs, real-time session recording, and n8n webhook integration for data collection.