This was fun. I enjoyed the controls, they make it feel like a switchboard that a conductor might use (no idea if this is how it works). Something to look into for low effort polish for 3D games is making quick n dirty textures with ShaderMaterial or StandardMaterial and Noise2D as a sampler to add random noise and like the other commenter said, adjust things like specular or roughness and maybe move the vertices based on the random noise. Overall great entry, and nice use of procedural generation.