The puzzles are really well designed, I loved them!
The Physics were generally pretty good, but some boxes were sometimes hard to push. I think there should be more frequent checkpoints, because it was easy to fall off and it felt too punishing to start the whole puzzle over, esspecially when sometimes the second ball that I wasn't controlling fell off and it felt unfair.
I think for a jam there was enough content, but I would love to see new levels in the future, perhaps maybe with more balls?
Great, polished game, congrats!