I really loved the way you approached to the gamedesign and leveldesign. Changing level depending on an item you picked is really clever. All the platforming seems very logical. But the movement itself must me smoother. You should adjust some Rigidbody values (gravity scale for a character, clamped speed, countermovement etc) to make character feel more precise. All the work you've done on the graphics is awesome, especially 2D art and lighting. Wish there was also some sound. Overall, fantastic game. It should have a lot more reviews.
Check out my game too if have time :)