Thanks for sharing! A couple notes:
1. The score doesn't reset when you restart the level
2. The game doesn't appear to have any kind of end state, but nor is it infinite. a definitive ending of some nature would help quite a lot
3. I would recommend changing the platforming physics to make the player reach top horizontal speed when the key is pressed faster, and to make it reach 0 when the key is released faster. You'll find that makes your controls feel tighter. Remember, it's a platformer character, not a car.