Wow, did you really make this all with assets, music, and gameplay in just ~two weeks?! It's quite polished! How long have you been working on GM games?!
The simple arrows plus spacebar mechanics are WONDERFUL! This is probably the game that I enjoyed the most so far in the sense of the ease of understanding how to interact with everything. Very intuitive for me.
Haven't tried co-op, but I take it it would be much easier to handle, because the conveyor just moves way too fast to be able to move from one side of the room to the other. It is like an action-memory game. I seriously just started throwing stuff on the ground to keep it from going out!
I think it would work just as well without the rat and if the blueprints didn't move and were just on a separate table. I have a hard time at the corners (i.e. standing around with an item waiting for two turns to get the blueprint out of the corner) and timing it correctly to put the item on the blueprint, but maybe that's what you want.
Otherwise, the tutorial was great! And the boss's sarcasm is super funny!
Either the game balance needs better tweaking, or if you like it this way, I'm just bad at it! Haha. Still quite fun and interesting. Is this how they really make neon signs?! If so, I learned something new!