First, I would take off the mustard. Then, I would take the stars blocks apart, and scatter them instead of sewing them into rows. It would be a lot of work, but well worth it. It's a rainy day project and could also be done in the evening while "listenting" to TV It would be a shame to just abandon all the work you have put into it. The stars are beautiful. There are so many colors available these days for the borders. Alex Anderson's books are helpful.
She's a star person, and so am I. You did a wonderful job on your stars. Good luck. GiGi