Hey this is actually very fun! We both have a very similar take on this theme but I very much enjoy your game actually! There is so much polish in this game that makes it very smooth and easy to play. A few small things that I particularly like:
1) That "dum" sound effect when a box hits the floor, very clean and adds weight to the boxes, like!
2) Small rotations of the box character as he jumps off ledges and etc, looks so smooth and well done! Kudos to you for that!
You've clearly put a lot of effort into this and I admire it! Having made a game of similar take, I have learnt an extraordinary amount examining your game in detail. Excited to see you expand on this game, even if just a little bit more!