Added an animated starfield background with falling neon-colored particles that match the Tetris color scheme, plus a glowing border around the game board.

**Next Ideas:**
1. **Pulsing Glow Effects** - Add a rhythmic glow pulse on the board border that intensifies when lines are cleared
2. **Grid Lines** - Add subtle animated grid lines inside the board that shimmer

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