After playing all the workshop levels available for this game, I have made a
Guide to the BEST Chromagun Workshop Levels .

In the guide, this level is featured as the "Hardest Fair Level (#1)"

Well, I finally finished it after what must have been 50 tries. (I got really good at doing the first half, ) That was the answer I found, by the way. Don't reveal the spoiler if you want to figure it out on your own.

I couldn't finish it. Given that the precision required in the first part is so demanding, I gave up after around 15 tries. I couldn't get past the black drones. I would like to hear how to do it if you know. The only way I could see would be to trap them behind the yellow doors ... but the timing on that would be insane. I only tried that twice.