I see that you also did the single asset no text only mouse challenge :D I applied the fix to the file, but the instructions on itch says it is in the level2 file, but it is actually the level1 file that needed to be changed. And it needs a hex editor, not just any plain text editor.
The game broke down for me in level 4 I think. I missed a conveyor switch in the bottom left and when I noticed it, the parts that were supposed to go in there disappeared once they reached it. At that point there had been a lot of them going the wrong way so it probably got clogged up or something.
As for the game itself, good stuff! I think the conveyor turning is a bit slow and it's annoying that you can't click it again while it's in motion for when you made a mistake. But those are my only complaints, really. I'm glad that you can't lose (well, except due to bugs :D but not as a game mechanic) because this game is stressful enough as it is after the first few levels :D
Really good job, well done!