Done! Each weapon now plays its unique sound effect when you shoot:
- Pistol: Sharp, quick pop
- Shotgun: Deeper boom with noise
- Machine Gun: Rapid, lighter shots

**Next Ideas:**
1. **Impact Sounds** - Add satisfying hit/kill sounds when bullets strike enemies with pitch variation
2. **Ambient Music** - Create dynamic background music that intensifies during boss fights and victory

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