Very good game.

Usually I try to find things that are not so good and then make suggestions for improvement. But with your game this was almost impossible.
Here are just a few tiny things that I would have done differently.

The texture that connects two boxes is unfortunately only a white line. Maybe a rope or something like that would have been cool here.

Unfortunately there is no background music. That's not really a big problem, just would have added some more.

At the end I would have liked a victory screen. SO I actually thought the game had crashed.

But this is nagging at a high level. Good game!

My 2nd Run

Super cool pixel art, following :)