Game created at `public/orbital-harmony.html`

Features implemented:
- Physics-based orbital mechanics with gravity calculations
- 5 planet types (rocky, gas giant, ice, volcanic, crystal) with different masses and speeds
- Real gravitational interactions between star and planets
- Planet-to-planet gravity effects
- Stability meter based on orbital deviation and collisions
- Orbit trail visualization
- Time warp mode (3x speed)
- 3 challenge scenarios + sandbox mode
- Touch and click controls for planet placement
- Space theme with animated starfield
- Energy and score tracking

Click near orbit rings to place planets. System stability increases when planets maintain stable orbits without collisions.