cool idea! I remember suggesting the idea of using conveyor belts for something and my team voted for something else lol
I have to agree with other comments, controls can be a bit uncomfortable considering the same key is not used to pick up & drop, and another small thing is that they feel a bit cramped to a single hand if you play WASD (I only realised a bit at the end that I could use arrows)
nonetheless, I like factory games and this one delivers nicely, good stuff :)