Nice work! The pixel art is great and the music fits well.
I liked the level design, especially the Super Mario Maker-esque reverse psychology trolls with an arrow pointing where the good outcome is after the player gets trained otherwise ^^
The controls were pretty good (the character could be a little lighter but that's just preference).
I liked the boss at the end and the "looped plot" ending was great as well.
All in all, cool game!
Also, feel free to check out my submission, it's a platformer as well!
On a sidenote, I wouldn't smooth camera movement when using Unity's Pixel Perfect, it makes it jitter a lot. You could lock it on the character with some movement buffer in y axis (or even better use a static cam and move it only when needed).