I like the idea of having a bunch of workers and a bunch of orders at the same time, but something else should also be there, to spice things up a bit.
Also, sorry for not playing 100 levels, but it gets kinda repetitive after level 5.
1st edit, correcting some of the text to make it easier to read.
2nd edit, I forgot to mention what the edit was for, so here we are now.