I've created a complete Hill Climb Racing style game with all the features you requested:

**Core Features:**
- **Physics-Based Movement** - Realistic car tilting, suspension, and momentum using Matter.js physics
- **Fuel Management** - Fuel depletes as you drive, collect fuel cans to keep going
- **Endless Terrain** - Procedurally generated hilly terrain that extends infinitely
- **Cartoon Vehicle** - Bright red car with oversized wheels and visible suspension
- **Score System** - Distance-based scoring with leaderboard integration

**Gameplay Mechanics:**
- Hold **ACCELERATE** (gas pedal on mobile, or keyboard on desktop) to drive forward
- Press **BRAKE** to slow down on steep descents
- Balance your speed and fuel consumption
- Collect yellow fuel cans scattered along the track
- Game ends when you run out of fuel or flip over

**Tunable Parameters** (adjust in real-time):
- Engine Power - Control acceleration strength
- Tire Grip - Adjust traction on hills
- Fuel Consumption Rate - Make the game easier or harder
- Terrain Difficulty - Control how steep the hills get

The game features smooth physics with exaggerated suspension, procedural terrain generation that creates challenging hills and valleys, and a bright cartoonish art style. The SDK automatically handles controls for both mobile (touch buttons) and desktop (keyboard).

**Next Ideas:**
1. **Multiple Vehicles** - Add a monster truck, motorcycle, or lunar rover with different stats (speed, fuel efficiency, suspension)
2. **Coin Collection System** - Scatter coins along the track to unlock new vehicles and upgrades

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