The game looks complete. Here's a summary of the performance and visual improvements:

**Performance Improvements:**
- Reduced polygon count (48 segments instead of 64 for track geometry)
- `antialias: false` with `powerPreference: 'high-performance'`
- `BasicShadowMap` instead of `PCFSoftShadowMap` (faster shadows)
- Capped pixel ratio to max 2 
- Particle limits to prevent memory bloat (60 smoke, 30 sparks, 200 tire marks)
- Exponential fog for better draw call culling

**Visual Enhancements (Initial D style):**
- Darker, moodier scene with deep purple/blue tones (`0x050510`)
- ACES Filmic tone mapping for cinematic look
- Vignette overlay for focus effect
- **Speed lines** that appear at high speeds (>70% max)
- Glowing neon track boundaries with animated pulse
- Pulsing track lights that animate
- Car headlights and reactive tail lights (brighter on brake)
- **Sparks** that fly when drifting hard
- Speed bar HUD element
- Enhanced glow effects on all UI text
- Combo scale animation when active

**Next Ideas:**
1. **Nitro Boost** - Add a nitro/boost mechanic with screen blur and trail effects when activated
2. **Ghost Replay** - Record your best lap and race against a ghost car to beat your time

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