I saw this game posted during the development and got super excited! The graphics look amazing and so does the sound.
I love the concept and micromanagement fits the bill theme-wise.
I did have a hard time with the controls, however. They were a bit unresponsive, at least for me. It seemed random when I could (or couldn't) pick up boxes. This did have a rage inducing effect on me. :(
Overall I think this is a game worth developing further!
**edit**: Ok, I tried the windows version now (previously I played the web version) and controls are much better! It's amazing how much content you managed to produced in so little time. Really enjoyed the game and believe, even more so now, that you should keep developing this idea! It's a fun minigame and I could see it working on mobile also (with some polish to the control scheme)