I think this is a great idea! We do something similar to get my son to finish his veggies that are not his favorite. I put his entire serving of vegetables on his plate, but only a small amount of his protein and carb. Of course, he gobbles up the other foods, and asks for more. I tell him he must eat two bites of the veggie, and then he can have some more. Once he eats the veggies, I put another small amount of rice, pasta, ect, and repeat until all of the veggies are gone. I am lucky to have a good eater who likes most vegetables and eats them willingly, but this works great for the ones he doesn’t love!
I kind of like the idea of making it a game but sometimes we don’t have time for games (or patience he he) I have one twin who loves most veggies and the other twin who will eat it if she sees everyone else around her eating it and if she doesn’t get offered any other alternative food (especially if said alternative food is sweet)