The first time I tried this game I just gave up after not knowing what should I do.
I decided to give it a second try though and here are my thoughts.
I don't know how to recognize which box represent electronics and which one is supposed to be toys. I just found myself in a position, where all boxes were delivered, and I was just waiting for new ones to spawn, which didn't seems so fun. To fix that, I guess the timers should be made less random? Overall I see the core of game which could be enhanced somehow. Right now it seems repetitive without any twist to make it interesting. Maybe some other moving parts that make this delivery more harder?
I would love to see the game further develop, to see what more is there to offer.