I really like the art style, and the puzzles all seems to be properly thought out, a really well done job, it must not have been easy to design all of the levels to keep a steady pace of difficulty!
A little note, on the controls, I would add a sort of "coyote time" when you're jumping off from a wall and you press in the opposite direction before jumping, instead of having the characters completely disconnect from the wall, I failed multiple jumps because of that since my brain is so used to other games that work in a similar way.
Strong submission, good job!