Wow, I love this! The gameplay is really well done and the level design is super impressive. Very clever concept too, with a really nice interpretation of the theme! The physics feels a little wonky sometimes, and I don't always know which side of a box I'll end up on when I change its size. It would also be nice to have an indicator that showed how big or small a box could get, and the sounds helped a lot with that. Overall really great game with a really nice and polished aesthetic!