Great Quality! I really like the use of color palette.
Very well made concept.
The gameplay is very nice but still can be improved;
- Adding Coyote time / wider ground check collider
- Lowering the starting acceleration a little so it gives a smooth movement
- (I'm not sure if it's intended) Maybe falling will only send you one level back? or just to the start of the current level...
But I really had fun playing your game, overall it's a great game!
Good job, keep working on it!