You had a pretty interesting idea for this, I hadn't considered trying to remake Overcooked's mechanics in RM before. :)
Unfortunately it's clear time got away from you for the contest, since while things work I had no in-game info about how to do things properly. The first playthrough I couldn't even pick up the cut tomatoes. ^^; I finally figured it out, but then messed up the actual cooking because I didn't know I needed more than one tomato in the pot... My best result was 3 completed dishes, with 2 failed.
Overall, it was a cool idea to do this, but I don't think the unaltered Overcooked mechanics work well in RM because it's single-player. If you work on this more, maybe you could let the player focus on one thing (like cooking or dishwashing) and have them set NPCs to do other tasks.