I think it is the first game I found on this jam with such a creative idea! Very well, done!
Not really a big problem but would suggest some kind of introduction to get a feeling of how high can player jump. Because I didn't know that you can scale player up in the fist level. So it took me quite a while of going back and forth to find correct size boxes so player could jump on them.
Overall, it was amazing experience and art style made it even better!