This was cute! For a one person project the fact that you got all this mechanics and even music is kind of impressive! Also loved the friends that help you, there is something goofy about a block with eyes, hehe. i wish they made little sounds when you jumped on them or something!
Also really nice work on changing the pallete and artwork when changing levels. One of those details that make the game way more enjoyable visually yet were not needed in this kind of game, and for that you deserve props, hehe
Hey! i noticed your character gets stuck on walls if it's falling. Must probably be that when you change the sprite the hitbox changes with it? It's kind of a common problem in gamemaker, but i'm not sure in unity 2d.
Got stuck in the orange level, the falling blocks didn't respawn at all. Maybe i missed something, and if so, sorry!