I've created a sophisticated light reflection puzzle game with all the requested features!

**Core Features:**
- **Mirror System**: Click to place mirrors, click again to rotate 45° increments
- **Prism Mechanics**: Split light into component colors (white→RGB, yellow→RG, etc.)
- **5 Progressive Levels**: From simple reflection to complex color mixing challenges
- **Light Painting Mode**: Free-form creative mode with 3 colored light sources
- **Real-time Physics**: Dynamic beam tracing with reflection and color mixing
- **Touch Controls**: Full mobile support with tap-to-place mechanics

**Gameplay:**
- Select tool (Mirror/Prism/Erase) from top-right panel
- Click grid cells to place/rotate mirrors or place prisms
- Guide colored beams to matching colored targets
- Mix colors using prisms to create secondary colors
- Complete all targets to advance

**Visual Polish:**
- Reflective silver gradients on mirrors (#C0C0C0, #FFFFFF)
- Glowing colored light beams with bloom effects
- Rainbow prismatic effects on prism triangles
- Dark background (#000000) for maximum contrast
- Crystalline sound effects and ambient music

**Next Ideas:**
1. **Multi-Beam Intersections** - Add beam splitters that create copies when beams cross, enabling parallel puzzle paths
2. **Rotating Obstacles** - Implement spinning mirrors and moving targets that change position over time for dynamic challenges

**Ready to level up your game? Pick one and let's build it!**